Plugin Suggestion

[mattjtv]

A plugin called "Simple Censor" When someone says a word that was blacklisted in the config, it will replace the letters with asterisks. There isn't many ways around this plugin, you can space out your letters, put dots between, put hyphens between, or any symbol between and it will still censor the word out.

http://dev.bukkit.org/bukkit-plugins/simple-censor/