Top Definition
When a man puts his hard cock in another persons anus and fucks it without going too far into the rectum so as to surf the anal sphincter.
Sphincter surfing works best when the penis is pulled out of the anus then put back in again repeatedly in fast succession.
by Dontbeusinyourrealname November 26, 2010
A guy that likes putting his cock in other peoples buttholes.

A woman that uses a strap-on in other peoples butts.
John was sphincter surfing with Debbie on the beach.
by Vic of the North May 15, 2008
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