The act of grunching for a sustained period of time. Self fistation, a period of masturbation through the act of fisting yourself in the arse with resultant fecal leakage, and possible blood loss.
Doctor: What seems to be the problem here Nurse?
Nurse: Im afraid its another case of blood loss
Doctor: To get your grunch on you have to be more careful
by The real Tyler James August 28, 2008

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.

×