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2 definitions by The real Tyler James

 
1.
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
 
2.
Grunch(verb) The act of self fistation, Fisting yourself in the Anal cavity.
"Get your grunch on" - the act of a hearty night of "tearing yourself a new one" *may result in bleeding
by The real Tyler James August 26, 2008