Top Definition
A stain on your shirt; commonly found after eating. makes you look like you eat like a pig.
girl: don't look at my shirt, I spilled soup on it at lunch.

guy: ohhh! you got a fat boy stain!!

#pig #messy #fat #boy #phat #boi #clean
by karly;; May 28, 2008
7 Words related to fat boy stain
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.