A friend of mine works at an insurance company and used Testicle as a test name. It wasn't that funny when a customer called his workplace asking why he got a letter that starts with "Hello Mr Testicle".
One of my former colleagues used to put weird error messages (made up words mostly, but really funny to pronounce). One of these messages escaped QA and went to a customer - but this was a nice guy, and he called up and asked what that word means (it was a while ago, can't remember the word now).
We didn't have anything to do one afternoon, so we searched google maps for names of funny places - there is a town called Hell. Imagine going there and reading the sign "Welcome to Hell". Good times were had at that job :p