This is the act of pulling a chick's (or a dude's, if you're into that kinda thing) sphincter out of her bunghole after a session of dangerous, sloppy butt sex. After a chick has been spincted, she'll have to wear Depends, for sure.
SPHINCTING...
"Wanda, why are you wearing an adult diaper?"
"Cuz some dude jumped me from behind and sphincted the shit outta me!"

"Man, it sure smells like shit in here!"
"That's me. I got sphincted last night, and now there's no difference between a deuce and a fart."
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The feeling of an expanded anus after a large discharge of waste has been released from the body
Rupert- Oh man I just took a huge dump.
Francis- Wow dude you are so sphinct right now.
by Ira Auberg July 11, 2008
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1. A bone in your butt

2. A term of derision, usually applied to small boys ages 9-11 who are foolish and immature. Such boys are often skinny distance runners. They will usually attach to older roll models, often cousins, and refuse to stop annoying them despite countless hints, suggestions and outright commands to stop.

also they are often named Koby
by zachattax August 15, 2010
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(verb) to have anal sex with a girl.
Bob: "Dude, did you sphinct her?"
Joe: "Did I what?"
Bob: "Sphinct her. You know, did you have anal sex with her?"
Joe: "Yeah. And ohhh, I get it now; sphinct her, like sphincter... nice."
by josh_SLC January 28, 2010
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The way your ear piercing can look like a butt hole if you gauge it too big too quickly.
My buddy Trevor got sphinct-ear when he tore his ear lobe by skipping from 4 gauge to double zero gauge.
by ruthless toothless August 31, 2013
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That split second just as you realise something really bad has/is about to happen, your stomach feels like you're falling off the top of a tall building and your sphincter grips up tighter than a Duck's Arse.
1. I was in the office late at night and thought the place was empty, I was just about to start Rounding up the tadpoles when a cleaner walked in! There was a sphinct-o-second moment while I frantically packed my todger away.

2. Sent a sext message saying "I'll be home in 5, lube yourself up!" and as I hit sent, I saw "Received: mother in law" !
by ADzski March 7, 2019
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