Masturbating while eating a greasy cheeseburger using the excess grease and condiments as lubrication.
TJ: Yo! going down to Mickey D's, you want something?
Travis: Quarter Pounder extra catsup, I'm gonna grubby chubby on down tonight!
Travis: Quarter Pounder extra catsup, I'm gonna grubby chubby on down tonight!
by slappinfish November 9, 2010
Get the Grubby Chubby mug.