A rather unpleasant experience, with equal negative intensity to that of the positive of an orgasm. Antigasms balance the universe
Shut up Rachel, your negative attitude is giving me an antigasm
by Anthony Appleton July 9, 2005
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An experience so horribly revolting that it causes horrible amounts of pain instead of pleasure. These experiences are often ones that scar a human psyche leaving the sufferer distressed
"Dude look at that chick she's huge!!!"
"Oh god I saw her thong. I'm having an antigasm!!"
"Oh lord the pain!!"
by Jsalami August 15, 2009
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