diff --git a/app/assets/javascripts/autocomplete.js b/app/assets/javascripts/autocomplete.js
index 7b6274ee8..aaf50081e 100644
--- a/app/assets/javascripts/autocomplete.js
+++ b/app/assets/javascripts/autocomplete.js
@@ -21,6 +21,9 @@
     );
 
     var prefixes = "-|~|general:|gen:|artist:|art:|copyright:|copy:|co:|character:|char:|ch:";
+    var metatags = "order|-status|status|-rating|rating|-locked|locked|" + 
+      "-user|user|-approver|approver|commenter|comm|noter|artcomm|-fav|fav|ordfav|" +
+      "sub|-pool|pool";
 
     $fields_multiple.autocomplete({
       delay: 100,
@@ -50,7 +53,7 @@
         }
 
         var term = before_caret_text.match(/\S+/g).pop();
-        var regexp = new RegExp("^(?:" + prefixes + ")(.*)$");
+        var regexp = new RegExp("^(?:" + prefixes + ")(.*)$", "i");
         var match = term.match(regexp);
         if (match) {
           term = match[1];
@@ -59,25 +62,55 @@
           return;
         }
 
-        $.ajax({
-          url: "/tags.json",
-          data: {
-            "search[order]": "count",
-            "search[name_matches]": term + "*",
-            "limit": 10
-          },
-          method: "get",
-          success: function(data) {
-            resp($.map(data, function(tag) {
-              return {
-                label: tag.name.replace(/_/g, " "),
-                value: tag.name,
-                category: tag.category,
-                post_count: tag.post_count
-              };
-            }));
-          }
-        });
+        regexp = new RegExp("^(" + metatags + "):(.*)$", "i");
+        var match = term.match(regexp);
+        var metatag;
+        if (match) {
+          metatag = match[1].toLowerCase();
+          term = match[2];
+        }
+
+        switch(metatag) {
+        case "order":
+        case "status":
+        case "-status":
+        case "rating":
+        case "-rating":
+        case "locked":
+        case "-locked":
+          Danbooru.Autocomplete.static_metatag_source(term, resp, metatag);
+          break;
+        }
+
+        if (term === "") {
+          return;
+        }
+
+        switch(metatag) {
+        case "user":
+        case "-user":
+        case "approver":
+        case "-approver":
+        case "commenter":
+        case "comm":
+        case "noter":
+        case "artcomm":
+        case "fav":
+        case "-fav":
+        case "ordfav":
+          Danbooru.Autocomplete.user_source(term, resp, metatag);
+          break;
+        case "sub":
+          Danbooru.Autocomplete.subscription_source(term, resp);
+          break;
+        case "pool":
+        case "-pool":
+          Danbooru.Autocomplete.pool_source(term, resp, metatag);
+          break;
+        default:
+          Danbooru.Autocomplete.normal_source(term, resp);
+          break;
+        }
       }
     });
 
@@ -116,27 +149,174 @@
       }
     });
 
-    var render_tag = function(list, tag) {
-      var $link = $("<a/>").addClass("tag-type-" + tag.category).text(tag.label);
-      $link.attr("href", "/posts?tags=" + encodeURIComponent(tag.value));
-      $link.click(function(e) {
-        e.preventDefault();
-      });
+    $.merge($fields_multiple, $fields_single).each(function(i, field) {
+      $(field).data("uiAutocomplete")._renderItem = Danbooru.Autocomplete.render_item;
+    });
+  }
 
+  Danbooru.Autocomplete.render_item = function(list, item) {
+    var $link = $("<a/>").text(item.label);
+    $link.attr("href", "/posts?tags=" + encodeURIComponent(item.value));
+    $link.click(function(e) {
+      e.preventDefault();
+    });
+
+    if (item.post_count !== undefined) {
       var count;
-      if (tag.post_count >= 1000) {
-        count = Math.floor(tag.post_count / 1000) + "k";
+      if (item.post_count >= 1000) {
+        count = Math.floor(item.post_count / 1000) + "k";
       } else {
-        count = tag.post_count;
+        count = item.post_count;
       }
       var $post_count = $("<span/>").addClass("post-count").css("float", "right").text(count);
       $link.append($post_count);
+    }
 
-      return $("<li/>").data("item.autocomplete", tag).append($link).appendTo(list);
-    };
+    if (item.type === "tag") {
+      $link.addClass("tag-type-" + item.category);
+    } else if (item.type === "user") {
+      var level_class = "user-" + item.level.toLowerCase();
+      $link.addClass(level_class);
+      if (Danbooru.meta("style-usernames") === "true") {
+        $link.addClass("with-style");
+      }
+    } else if (item.type === "pool") {
+      $link.addClass("pool-category-" + item.category);
+    }
 
-    $.merge($fields_multiple, $fields_single).each(function(i, field) {
-      $(field).data("uiAutocomplete")._renderItem = render_tag;
+    return $("<li/>").data("item.autocomplete", item).append($link).appendTo(list);
+  };
+
+  Danbooru.Autocomplete.normal_source = function(term, resp) {
+    $.ajax({
+      url: "/tags.json",
+      data: {
+        "search[order]": "count",
+        "search[name_matches]": term + "*",
+        "limit": 10
+      },
+      method: "get",
+      success: function(data) {
+        resp($.map(data, function(tag) {
+          return {
+            type: "tag",
+            label: tag.name.replace(/_/g, " "),
+            value: tag.name,
+            category: tag.category,
+            post_count: tag.post_count
+          };
+        }));
+      }
+    });
+  }
+
+  Danbooru.Autocomplete.static_metatags = {
+    order: [
+      "id", "id_desc",
+      "score", "score_asc",
+      "favcount", "favcount_asc",
+      "comment", "comment_asc",
+      "note", "note_asc",
+      "artcomm", "artcomm_asc",
+      "mpixels", "mpixels_asc",
+      "portrait", "landscape",
+      "filesize", "filesize_asc",
+      "rank"
+    ],
+    status: [
+      "any", "deleted", "active", "pending", "flagged", "banned"
+    ],
+    rating: [
+      "safe", "questionable", "explicit"
+    ],
+    locked: [
+      "rating", "note", "status"
+    ]
+  }
+
+  Danbooru.Autocomplete.static_metatag_source = function(term, resp, metatag) {
+    var sub_metatags = this.static_metatags[metatag];
+
+    var regexp = new RegExp("^" + $.ui.autocomplete.escapeRegex(term), "i");
+    var matches = $.grep(sub_metatags, function (sub_metatag) {
+      return regexp.test(sub_metatag);
+    });
+
+    resp($.map(matches, function(sub_metatag) {
+      return metatag + ":" + sub_metatag;
+    }));
+  }
+
+  Danbooru.Autocomplete.user_source = function(term, resp, metatag) {
+    $.ajax({
+      url: "/users.json",
+      data: {
+        "search[order]": "post_upload_count",
+        "search[name_matches]": term + "*",
+        "limit": 10,
+      },
+      method: "get",
+      success: function(data) {
+        resp($.map(data, function(user) {
+          return {
+            type: "user",
+            label: user.name.replace(/_/g, " "),
+            value: metatag + ":" + user.name,
+            level: user.level_string
+          };
+        }));
+      }
+    });
+  }
+
+  Danbooru.Autocomplete.subscription_source = function(term, resp) {
+    var match = term.match(/^(.+?):(.*)$/);
+    if (match) {
+      var user_name = match[1];
+      var subscription_name = match[2];
+
+      $.ajax({
+        url: "/tag_subscriptions.json",
+        data: {
+          "search[creator_name]": user_name,
+          "search[name_matches]": subscription_name + "*",
+          "limit": 10
+        },
+        method: "get",
+        success: function(data) {
+          resp($.map(data, function(subscription) {
+            return {
+              label: subscription.name.replace(/_/g, " "),
+              value: "sub:" + user_name + ":" + subscription.name
+            };
+          }));
+        }
+      });
+    } else {
+      Danbooru.Autocomplete.user_source(term, resp, "sub");
+    }
+  }
+
+  Danbooru.Autocomplete.pool_source = function(term, resp, metatag) {
+    $.ajax({
+      url: "/pools.json",
+      data: {
+        "search[order]": "post_count",
+        "search[name_matches]": term,
+        "limit": 10
+      },
+      method: "get",
+      success: function(data) {
+        resp($.map(data, function(pool) {
+          return {
+            type: "pool",
+            label: pool.name.replace(/_/g, " "),
+            value: metatag + ":" + pool.name,
+            post_count: pool.post_count,
+            category: pool.category
+          };
+        }));
+      }
     });
   }
 })();
diff --git a/app/models/tag_subscription.rb b/app/models/tag_subscription.rb
index f6bf08b02..2d81da10c 100644
--- a/app/models/tag_subscription.rb
+++ b/app/models/tag_subscription.rb
@@ -75,6 +75,10 @@ class TagSubscription < ActiveRecord::Base
       where("creator_id = ?", user.id)
     end
 
+    def name_matches(name)
+      where("lower(name) like ? escape E'\\\\'", name.to_escaped_for_sql_like)
+    end
+
     def search(params)
       q = scoped
       params = {} if params.blank?
@@ -87,6 +91,10 @@ class TagSubscription < ActiveRecord::Base
         q = q.where("creator_id = ?", CurrentUser.user.id)
       end
 
+      if params[:name_matches]
+        q = q.name_matches(params[:name_matches].mb_chars.downcase.strip.tr(" ", "_"))
+      end
+
       q = q.visible_to(CurrentUser.user)
 
       q
diff --git a/app/views/layouts/default.html.erb b/app/views/layouts/default.html.erb
index 4ee0a796c..8237f39ab 100644
--- a/app/views/layouts/default.html.erb
+++ b/app/views/layouts/default.html.erb
@@ -18,6 +18,7 @@
   <meta name="new-post-navigation-layout" content="<%= CurrentUser.user.new_post_navigation_layout %>">
   <meta name="default-image-size" content="<%= CurrentUser.user.default_image_size %>">
   <meta name="enable-auto-complete" content="<%= CurrentUser.user.enable_auto_complete %>">
+  <meta name="style-usernames" content="<%= CurrentUser.user.style_usernames? %>">
   <meta name="mobile-mode" content="<%= CurrentUser.mobile_mode? %>">
   <%= auto_discovery_link_tag :atom, posts_path(:format => "atom", :tags => params[:tags]) %>
   <%= stylesheet_link_tag "application", :media => "screen" %>