Ever seen those letters on a tombstone and wondered what they ment? I have a few times and just now, due to being bored, checked what it stands for.

Apparantly it's an abbreviation for:

"Non Fui, Fui, Non Sum, Non Curo."

It's latin and means "I did not exist, I existed, I do not exist, I don't care.".

Personally I think it's an awesome thing to have on your tombstone and something to consider when that time is due. :P