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Usually occurring in a male either a) just hitting puberty or b) partaking in copious amounts of sexual intercourse. Symptoms include thrusting, or humping, upon sight or contact with someone of the opposite sex.
"All I did was shake his hand and he just started thrusting at me!"
"Don't worry. He just had a touch of the perma-hump."
by Mae F December 22, 2008
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