The act of spreading one's ass to expose the anus then giving a quick tug on one's nutsack while having the finger insterted into the anus to result in a clenching reflex of the anus.
Jaret was supprised to learn that Louis's anal reflexes where quite strong for his old age after giving him an anal wink.
by Ian Jewbag June 08, 2006
by Buttpucker September 05, 2015