Top Definition
When you make your hand like a cup and grab a girl on the vagina (its more of a cup that a grab)
You're standing around at a party, you say "twatgrab" in a a screeched voice and then grab a girls vagina (preferably your mrs or a girl that wont mind you grabbing her there) WARNING you may get bitch slapped.
by MelvinMarvin February 04, 2010
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