To perform an act of masturbation.
The village idiot was masturbating.
by Root January 20, 2003
The worlds leading cause of blindness
Did you hear that masturbating makes you blind, its true
by Double D123 May 26, 2008
Having sex with your own hand or even using a fake dick (dildo) in the case of girls (or very messed up guys)... its very pathetic.
John is masturbating every night because he has no hope of ever having actual sex.
by CanHasHaxx February 05, 2009