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1.
Saying you have something that you don't or saying you are going to do something that you arn't going to do.
Bluffing is often used in poker.
by Martin January 29, 2004
 
2.
Where a man eats his own or someone else's pubic hair.
James, I heard Justin just shaved his pubes!
James: "Yeah, dude! We were bluffing all night long!"
by shitmongrel May 15, 2008