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The act of wearing a bib while pissing into your own mouth, in mouth situations not swallowing it until your mouth is full or you run out of piss.
"Why are you wearing a bib and pissing into your mouth?"
"Dude it's the Cincinnati Oyster Bib!"
"That doesn't explain the piss."
"Yes it does."
by Been-gals April 14, 2010
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