Bad
From xat wiki
(BAD) - Custom bad words filter GROUP POWER
Bad is a group power that, when assigned, allows you to add your own custom bad words to the filter for your chat. This power also comes with bonus smilies, too.
To add custom bad words, assign the power to your group, click Edit Your Chat, Extra Features, and add the words into the box. For example: word1,word2,word3
Note: Words have to be 4 or more letters.