Top Definition
An orgasm achieved from anal stimulation.
Ben: Can girls have assgasms?
by sterlingheights September 11, 2005

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an orgasm stimulated by penetration of the ass.
my girlfriend just had an ass-gasm
by Kerndog October 26, 2003

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Involantary spasm of the prostate gland as a result of anal exploration!
I accidentally shoved my thumb up my arse whilst speed wanking and had what i can only describe as an 'Assgasmmmm'
by Danny Desuza November 02, 2009

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An orgasm brought about by anal sex.
Tom: Did you like how I f*cked you in the ass?
Cindy: Yeah, you totally made me assgasm.
by BritishBanter July 05, 2016

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When You are penetrating the ass of your partner and they suddenly shit all over your penis.
Man:Did you hear about mike and his new girlfriend?
Friend: No what Happened?
Man: He was having anal sex with his girlfriend and she had an Ass-Gasm all over his dick. It was Great.
by P-fo Fo Sho 18 September 30, 2009

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During Anal sex the party giving will ejaculate in the other. When the party receiving has their orgasm and the semen drains from their hiney that's an "Assgasm".
"Dude, i fucked Courtney so hard last night, she had an Assgasm!"
"Hey that happened to me and George!"

"What the fuck?!"
by SprinkleTits01 August 05, 2011

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The euphoric sensation associatted with anal sphincter contractions experienced after having an exceptionally large bowel motion.
John: ' I just did the biggest turd of my life.'
Sally : 'Assgasm?'
John ' Oh yeah.'
by arssia January 27, 2011

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