Tire Tracks 

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.

Tire Tracks by Robby H. October 21, 2004

busted out tracktor tire 

a gnarly pussy that looks like roast beef is dangling from

Most girls on sublime directory have pussys that look like blown out tractor tires.

busted out tracktor tire by goatcheese June 12, 2004