When a booty has a certain size and definition that it appears to consume any fabric surrounding it. E.g. shorts, dresses, leggings etc...
by Pygmy Hunter July 10, 2017
The part of your pants that always bunches to give the impression that you have a colossal hard on even when you don't.
John: Mark, you've got the fattest boner right now.
Mark: Nah bro, its just a fabric boner - hopefully Stacey didn't see.
Mark: Nah bro, its just a fabric boner - hopefully Stacey didn't see.
by Mr Goliath Balls April 13, 2022