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The act of getting botox in your Ass, usually to tighten it up or make it look better. Used most frequently by milfs and pornstars.
Joe: DAMN!! Danny, your mom's ass is lookin' FINE today! Did she get an asstox?

Danny: Dude...that's my mom...don't be gross...but yeah...she did...
by El Tostados January 26, 2010
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