diff --git a/bin/dcssd b/bin/dcssd
index 3821367..af53ddc 100755
--- a/bin/dcssd
+++ b/bin/dcssd
@@ -34,17 +34,22 @@ dotcss = Class.new(WEBrick::HTTPServlet::AbstractServlet) do
     files = []
     paths = path.gsub('/', '').split('.')
 
-    until paths.empty?
-      file = File.expand_path(paths.join('.'))
-      files << file if File.file?(file)
-      paths.shift
+    # if subdomain .css file is marked as non-inheriting
+    if File.file?(file = File.expand_path("_" + paths.join('.')))
+      files << file
+    else
+      until paths.empty?
+        file = File.expand_path(paths.join('.'))
+        files << file if File.file?(file)
+        paths.shift
+      end
+
+      files.sort_by! { |f| f.length }
+
+      # Default CSS to the front of the line!
+      files.unshift File.expand_path('default.css')
     end
 
-    files.sort_by! { |f| f.length }
-
-    # Default CSS to the front of the line!
-    files.unshift File.expand_path('default.css')
-
     body = "/* dotcss is working */\n"
 
     files.each do |file|
diff --git a/readme.md b/readme.md
index 3fe1ecc..19f9822 100644
--- a/readme.md
+++ b/readme.md
@@ -64,6 +64,17 @@ Attempting to run `rake install` within a tmux session may fail with the followi
 
 To avoid this, quit tmux before installing dotcss.
 
+## Non-Inheriting Stylesheets
+
+If you'd like to avoid inheriting from parent CSS files, give your CSS file
+a name of `_{domain}.css`.
+
+For example, on https://gist.github.com, by default, `gist.github.com.css` will
+be loaded along with `github.com.css` and `default.css`.
+
+But if `_gist.github.com.css` exists in the `~/.css` directory, it will be
+loaded by itself.
+
 ## Thanks
 
 - [Chris Wanstrath][defunkt] for [dotjs][], which 90% of this is based on.