Refers to the tightness of a girl's vagina. If a girl has a loose vag, she is said to have very little (if any) tread on her tires.
Hey, how was hooking up with Sarah last night?
Let's just say there's no tread on the tires.
She was that loose?
It was like throwing a hot dog down a hallway.
Gross.
by The Girl Who Waited November 30, 2014
Get the No tread on the tires mug.