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A man or woman's anus that has been penetrated to the point of appearing like a vagina. Usually this occurs when the outer anal sphincter is in a relaxed state. This can also be used to refer to a gay or bisexual man's, Transsexual, or Cross-dresser's anus since it's the main orifice for intercourse in the feminine (submissive) receiver. It can also be used to describe a woman's extremely loose anus - especially when it feels looser than the vagina to the male.
"I fucked that sissy's assgina through a hole in his panties last night."
"His assgina was gaping as I watched his girlfriend bang it with a dildo - she's gonna peg me with it next!"
"I fucked my transgendered friend's assgina last night."
"I tried anal with my girlfriend last night, but switch back to her pussy since her ass was so loose."
by Dill Pickelz August 02, 2014
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When a womend vagina and anus are torn through the taint to form one singular opening.
Man, I pounded that girl so hard in both holes that I tore her an assgina! I think she needs to see a doctor.
by Duane and Brian May 05, 2006
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look at that guy looks like hes going to hit his Bf's assgina when he gets home.
by S.A.C. August 18, 2008
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A term used when a woman is incredibly petite and gives birth causing her vagina to rip and connect to her ass. Causing the creation of one singular opening-The assgina.
"My wife just gave birth today, the baby was huge though. It's going to be forever for her assgina to heal."
"Dude i'm dating this super petite chick now." "How small is she?" "Assgina small." "Duuuuude, nice."
by WiseAss December 05, 2013
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1. Self lubricating anus found only in yaoiland. Commonly depicted in yaoi doujinshi and manga.

2. Weepy emo uke...So emo that he can be mistaken for a woman with pregnancy hormones. Also found typically in yaoi doujinshi and manga, but also occasionally appears in real life.

See also mangina
Reader 1: Yeowch! Damn, no lube? Bad Seme!
Reader 2: Nah, it's just an assgina, self lubing uke.

Reader 1: Wow, does this uke angst this much all the way through the tankobon?
Reader 2: Yup...He's a total assgina!
by mreowwl June 12, 2009
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A female lays on her back, while another female opens said vagina, then a male/female (depends on personal preference) then squats over open vagina, and shits into the opening. The female opening the vagina will close the vaginal flaps, leaving a small piece of the turd inside.
"Hey John, I was thinking we could make an ass-gina"
"Sure Abby, that sounds delicious!"
by Ching Long August 09, 2016
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