What in the ever-loving blue-eyed world is... was something my Dad used to ask. I've never figured that one out either.Also, Petomane is closer to Fart Freak than Farter - the -mane ending is cognate to Maniac in English.
At work I hear that things have "grown legs and walked away" when something goes missing.
Also, from my X2B's side of the family: when someone is taking too long in the bathroom, the person waiting outside will eventually holler Don't forget to write your weight on the wall! I finally asked what that's about. I'll let you guys guess.