Get Your Grunch On

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

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Grunch

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

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