A person who is beautiful, but who always says something stupid/crazy/annoying. He/she is called such, because, much like 911, when he/she opens his/her mouth, the whole world changes.
by apoxy September 30, 2012
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Get the Shit mouth mug.When you leave a little bit of mayo or sauce on the corner of your mouth after eating, and it looks like remnants of sexual activity.
by nico-p November 14, 2018
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