This addon filters your messages, replacing any word you'd like with... any other word you'd like. Note that this filters YOUR messages, i.e. what YOU say; there are already many ways to filter what others say
To add a word to the filter:
/filter <word> <replacement>
To remove a word from the filter:
/unfilter <word>
(without the brackets)
Any time you use a filtered word, it will be removed. The replacement word is optional; if left out the word will simply be replaced with "<snip>".