Humping with full-force. Groining is usually dry Humping an inanimate object vigorously just for shits and giggles.
nick: Brandon WTF are you doing to that punching bag?!?! (lol)
Brandon: GROINING!!! *humps punching bag vigoously*
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To shoot someone in the groin so that it takes them a week to die, ala the Andrew Jackson/Charles Dickinson duel.
Man, Dickinson was all disrespectin' his wife, and ol' Hickory went and groin-balled him.
Noun: 1. A female who is commonly known for engaging in sexual intercourse with multiple males in short periods of time. 2. A girl who is unfaithful to her boyfriend or husband.
I can't believe Sarah let Mark knock her up one night and then let Danny nail her the next night when she was going out with Terrence! What a groin hopper!
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The gap on each side of a fit man's six pack abs and his pants.
That Brad Pitt sure has some fine groin cleavage in Fight Club.
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A groin goblin is a slang term used to describe ones genitals.
Guy 1: Hey, did you like the green goblin in that film the other day?
Guy 2: No, but I got a really itchy groin goblin in those bad cinema seats.
The art of talking bollocks.
Sometimes visibly faffing about and talking a load of old bollocks.
Someone is groin dangling when they spend time talking about things they think are important but everyone knows that in fact they are full of shit.
Bob: How did the meeting go?
Jim: Oh the usual. Andy was groin dangling again!