A phenomena occurring during gay sex where the giving man's scrotum slaps the receiving man's scrotum, sending them forward to the grundle then back to hitting the giver's scrotum, which then swing backwards, and repeats.
This is derived from the desktop toy known as Newton's balls
Hannable was riding Adam so hard that the Newton's Grundle could be heard from outside the bathroom.
Another name for a mans cock and balls, or...
When a gay orgy is in progress one takes a handfull of a mans section between his anus and balls and bites it.
No More Grundle Bundling...YOWW
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when you are plastered off your arse and you hook up with someone so hideous not even fugly can cover how revolting this person is.
"oh man i heard you hooked up with a grundle crust."
"please..don't remind me."
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During a fart, when air is compressed between the grundle and a hard surface- the air erupts to the nearest exit, usually out the front of the crotch. It is thunderous, not just for the thunderous noise it makes, but also because of the unsettling direction of the blow.
I had a serious thunder grundle in math class, i think i sprained my taint.
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Similar technique to the dirty Sanchez with the difference being where the lint, cheese, and or sweat is scraped from ones grundle area and smeared under the nose or across the mouth of an unsuspecting individual to simulate a mustache or grin of grundle goo.
After a laborious day at work, upon arrival at the divorce lawyers, I greeted my ex wife with a sour grundle grin.
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A thick, sticky, dark brown substance with putrid ripe stench oftentimes found within the area between a person's asshole and genitals.
Holy fuck, what smells like a decaying corpus?" "Off courrsee it's the Grundle Tar stuck to Horvach's gooch!!!
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The area between the moose ball sack and the bung.
There were some gnarly dingleberries hanging off that moose grundle. It was gross!
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