Top Definition
When the sphinkter contracts and expands especially during an orgasim.

What a female's asshole does during a really good oragasm
When I was doing my wife doggy style yesterday, she started to cum and gave me a sphinkter wink.

I gave it to her so good she started sphinkter winkin.
by The Zeppelin January 15, 2005
3 Words related to sphinkter wink

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