The tragic incident in which the small piece of skin on the underside of ones penis breaks in half causing immense pain. This is usually caused by roughly brushing the penis on the ground after intercourse.
Holy shit man! Another groundhog? You gotta start doing it on the bed instead!
by k0mmand0 April 7, 2004
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Male masturbation with the aid of a toilet paper roll, or in the case of those who are exceptionally gifted, a paper towel roll.
I was ground hogging with the roll yesterday, and got a paper cut.
by Bing77 October 9, 2011
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a bowel movement that is so large and impacted that you can squeeze out a portion, but can't pinch it off, so it goes back in.
After that ground hog dump, I need some laxatives.
by Mike Oxhard July 11, 2006
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The skid mark found in one's shorts after one refuses to defecate when one should.
Barbara: I had to shit so bad, but I didn't want to log off facebook.

Sue: So what happened?

Barbara: When I finally logged off, I found some ground hog grease in my panties.
by ryan p cooke April 25, 2009
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One who pleasures himself from the use of holes in a feild and/or grassy knoll.
My god! Ground Hog Day already???
by Geoff March 14, 2003
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A Ground-Hog Day-gasm is any cumgasm that a guy has on Ground-Hog Day.
Well, I had three Ground-Hog Day-gasms yesterday!
by USAF Cadet February 5, 2021
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