When the human waste comes out too soon and leaves a brown "track-like" looking shitstain on the inside of your momma's panties. It can also be found on the inside of a toilet bowl when your bastard, son-of-a-bitch brother drops the bomb.
Son: Daddy what are the brown marks on mommy's underwear?
Dad: Wow your a dumbfuck, those are your mother's shitstain tire tracks.
Dad: Wow your a dumbfuck, those are your mother's shitstain tire tracks.
by Robby H. October 21, 2004
When the driver is on a date and pretends to stop short in an emergency situation, hence putting his arm out as if to stop the passenger from flying through the windshield. But what he is really doing is feeling her boobs...
by Robby H. November 09, 2004
by Robby H. July 06, 2005
by Robby H. October 18, 2004
by Robby H. November 22, 2004
Performing the two tasks of masterbating and pooping in one bathroom visit, possibly at the same exact time.
Greg: "Alright I'm gonna go mooperbate in the bathroom, be back in a few."
Rob: "OK."
Rob: "That guy is such an asshole."
Greg: "Yeah I'm gonna mooperbate on his face."
Rob: "OK."
Rob: "That guy is such an asshole."
Greg: "Yeah I'm gonna mooperbate on his face."
by Robby H. February 08, 2005
by Robby H. July 06, 2005