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A way of putting someone down, usually joke wise.
Jon: Tom why u come in here lookin like ronald mcdonald on crack? hahaha!

Tom: ohhh! why u sinnin?

OR

Carol:Tell me why cathy look like Woopy Goldberg bet thats her momma.

Mary:haha oh damn you sinnin her.
by AyeYOBeezy August 14, 2009
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