What is Mud On The Tires?
1.
A term to describe when your having anal sex with either a man or woman and he/she accidentally/purposefully defecates all over your balls.
Damn man I was fucking this slut in the ass last night and she totally put some mud on the tires!.
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2.
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!!
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