Nickname for the individual in a group who won't shut his/her yapper. He/She always has a comment ready for any situation, be it appropriate or not (usually not).
Person 1: Wow my (poker) hand is ugly.
The Mouth: Just like your face! Hahahahaaa!
Person 2,3,....: <Shakes Head>
Person 1: Shut up and bet Marc.
September 08, 2005