1 definition by Stefan Bastardo
When a man is sufficiently obese that his penis can be engulfed in body fat, allowing him to stimulate himself by simple, repeated shifting of body position. This auto-erotic action is fatsturbating.
My obese college roommate would always fatsturbate on the couch next to me, yelling "Check it out! No hands!"
by Stefan Bastardo February 7, 2010