Top Definition
A verb, meaning to masturbate at speeds exceeding 55 mph. If you ever masturbated in a moving car or on an airplane that was not Flasturbating. It was masturbating in a car or an airplane. Flasturbation has to do with the speed of you hand.
The flash doesn't masturbate, he flasturbates.
by Seuse November 29, 2003
1 more definition
To masturbate while having a flaccid penis.
Devon: That was a great flasturbation session.
Gary: How do you even manage to flasturbate?
by Flasty December 22, 2014

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×