This project aims to make available a list of regular expression which match vulgar words. The list is far from comprehensive, but hopefully can be used as a first line of defense.
As a general rule, words which can have a legitimate use (say hancock) must be exact matches to (^(c|k|ck|q)[o0](c|k|ck|q)[s$]?$)
For best performance, if your library supports it, consider enabling explicit captures.