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Similar to kiss my ass, only deeper. Typically used in an escalating argument when a death blow is needed. Generally modified or enforced with fuck face, see example below.
Two people arguing:

person 1: Why are you such an douche-bag?

person 2: Go fuck yourself!

person 1: Fuck you!

person 2: Kiss my asshole, fuck face!
by zippojoker August 25, 2009
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