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the rolls of skin that are formed when one pushes the shoulder blades together
dude, you've got a backgina
Haha im fingering your backgina
by LongNine January 18, 2009
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The asshole of a person. Commonly referred to as backpussy.
Jeff asked his girlfriend if she would mind if he stuck it in her Backgina.
by Heninator December 17, 2007
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