Random House Historical Dictionary of American Slang, Volume I, A-G | 
My second-favorite reference book after the ghost encyclopedia. Here's a bit of hundred year-old slang for you: Cootie mill! Good times, WWI.
IndyHannaJones Well that explains where it came from though! You're basically saying boys are so gross they have bugs crawling on them 9y
TheWellReadOwl Learned something new! 9y