From a song from Jonathan Coulton, talking about a party. A town crotch is a person thats "good to go at anytime". Ready to have sex at anytime.

See also: town bicycle
(sees a slutty chick) Guy1: "Heey bob, there goes the town crotch!" Bob: "Hey now, thats my sister!"

girl1: "this is like the 6th girl he has went out with this week."
girl2: "sounds like we have a new town crotch"
by snakeeaterfan August 16, 2009
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