Withdraw so fast (from the back side and often times without lubrication) that what is pulled out looks like a rolled up pink sock. Also known as an inverted starfish.
Dude, the donkey punch didn't knock her out like you said it would; instead she bucked me off so hard that she she gave herself a "pink sock."
by Donkey May 27, 2004
When a guy fucks a girl's pooper loose, and pulls out quick so that her poopchute starts hanging out there like a pink sock. Basically if your pooper is this loose, you're a total skank.
After the frat boys took their turns on mindy's hiney, she ended up with a pinksock. Now she has a reputation as a buttslut, but I don't think she cares.
by Katey McShea November 24, 2006
After anal penetration when the males member or device is removed from the anus the inner anal passageway folds out surrounding the extracted shaft and exposing the inner side of the anus. The pink socks appear's like folds of pink skin hangin out of the asshole. It slightly resembales a pink sock hangin out of the asshole .also known as a pink shit
by Dan Junker March 31, 2003