Top Definition
The process of licking someone's asshole while he or she proceeds to lick yours simoultaneously. A more advanced version of the traditional sixtynine position.
Chris: "Hey man, did you lick that bitches ass last night?"

Ian: "Ya man, I asstynine'd that ho."
by Anal Connessiure September 26, 2009
5 Words related to asstynine

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