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slang for head, dome, oral sex, or pp in the mouth. Originates from mcdonald's and their #12 Dome piece chicken
by elmoslicer January 28, 2008
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2
It is a combonation of urination and defacation in the same restroom visit. Derives from from the words number 1 and number 2.
James: Hey Travis you were in there awhile. Did you do a number 2?

Travis: No man, a number 12.

James: Why do you give it a special name? Everyone pees when they poop most times...
by Wannnabe55 May 20, 2009
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