wildcats12's definitions

mud on the tires

When a girl wants to lose her virginity.

Also referred to as "getting your tires dirty" or "getting dirt on those tires"

Person 1: Girl, you better get some mud on those tires tonight!
Person 2: I'm trying!!

or

I better get my tires dirty tonight, or I'll be super upset!

Girl 1: Mud on the tires?
Girl 2: YES!! I got my tires really muddy!!

by wildcats12 March 4, 2009