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Getting a piece of ass in order to get back at someone. Typically, a close friend or relative works best.
John was so upset that his wife left him. So, he used her sister as a piece of grudgina.

That bitch really pissed me off, so I used her best friend for some hot grudgina.
by Kilzhot September 22, 2009
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Jun 24 Word of the Day
An exclamation made when your friends or family are teasing you to a point where you can't handle it anymore and a hissy fit is in order.

Derived from a YouTube user's famed outburst following Britney's lackluster performance at the 2007 VMA's.
Sarah: 'OMG Susan, I can't believe you are wearing the same skirt as yesterday. Oh, and by the way, EVERYONE knows what you did with Kevin on the weekend. Plus you look a little fat, are you retaining water?'

Susan: 'LEAVE BRITNEY ALONE!'
by Billy Chickenhole September 15, 2007
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