1 definition by Hexfet

Top Definition
A person who always says out loud any thought that comes into his/her head, usually with hilarious or mortifying results.
Friend: "We were talking about Donna's new husband Dave, and Anita blurted out that she used to sleep with him!"

Me: "Oh my god! That girl is mentally incontinent!"
by Hexfet November 23, 2009
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