Top Definition
The act of anal masturbation using either a finger or another tool.
Alyssa was assturbating during English class today.
by UDadder194 November 25, 2009
Masturbating by fingering your anus.
Jack: Dude, I so got laid last night!

Jim: What happened?

Jack: Well, I was at a party, and I walked into a room and I caught Lisa assturbating. So I asked her if I could join and we totally got it on!
by Vinchenzonaughti March 03, 2008
Playing with your own bunghole strictly for pleasure and personal gain.
Johnny was in the bathroom for hours on end , assturbating until the gentle sunrise caressed the horizon.
by stxnthamix October 11, 2015
Its where the male figure fingers his butt hole in an erotic manner until spooky white juice erects from his peepee hole.
Leland was exquisitely assturbating while watching brittney spears's new music video!
by b to the r a d March 06, 2009
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