a girl's boob that is smaller than the other one
"Do you think Lisa's flat tire is even an a-cup?"
by tracy99887 December 10, 2007
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Stepping on the back of someone's shoe so that they have to put it back on. When I moved to Los Angeles peaople were calling this a "wedgie," but that's plain wrong! A wedgie involves whitey-tidies and a display of upward force.
That bastard gave the blind guy a wedgie during a fire drill.
by Fred the nerd February 4, 2004
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Noun

Slang for 'half flaccid penis' or 'incredibly small and useless penis'. This is said to originated with the Tourette's Guy.
You Have a flat tire.
by misterissues June 12, 2009
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The sound that one makes when irritated, frustrated or just pissed. Very popular in the urban world. Sounds like a leaking tire.
The Flat Tire:

Cop: Put your hands on the car.

Urban Kid: Psssssssssssssssssssssssssssssssssssssssssssssss maaaannnn (imitating the sound of a leaking deflating flat tire)
by Snakepliskken November 19, 2017
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A sex act where the male intentionally loses his erection.
I totally gave this chick a flat tire last night. She was pissed, but at least it wasn't a blow out.
by Josh Hug December 5, 2009
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Hand in Texas Hold'em, a jack-four. Derived from:

Q: What's a jack for?
A: A flat tire
I have a really crappy hand that I shouldn't be playing, but it has a clever name. I love flat tires.
by bs February 14, 2005
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