When a woman lies about the men she has(n't) slept with. Often resulting in rumors and negative attention for the other parties involved, especially if the bluffmuff isn't attractive, which is often.
Hey, I heard that you slept with Cindy last night bro. How drunk were you?
Ah hell nah that bitch ain't nothin but a bluffmuff!
Ah hell nah that bitch ain't nothin but a bluffmuff!
by lalalululolo November 8, 2010
When a girl/ woman who is in a relationship with a man lies to the man she is with, about having sex with another
by Miranda Paige November 8, 2010