1 definition by grindinggirl

Top Definition
When someone usually a girl gyrates her hips on a guys crotch. The guy will usually grab her arm and have the other on her waist. Dirty dancing basically.
Person 1: So how was the party last night?
Person 2: hella fun we were grinding all night long in a grind line
Person 1: That's gross.
Person 2: No, it's really fun.
by grindinggirl January 23, 2011

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