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(n), the act or trait of a person that any one else considers to be the polar opposite of sexually attractive.
Pinocchio yearned for a woman but he knew his dicklessness would sextinguish any chance of a hump.

Dude1: "D'you hookup at Becky's last night?"
Dude2: "Nah, she didn't mention her rents were back from vacay. Total sextinguisher."
by X-gonna-give-it-to-ya May 11, 2016
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