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Running your mouth to your boss about stuff your friends tell you. Having to tell all secrets
Ernie loves to tell real and fake rumors to everyone.
He had diarrhea of the mouth. Ernie loves to research everyone and tell everyone about there lives because he has diarrhea of the mouth. He can not help but save everything because he loves to use it when he has a very severe case of diarrhea
by Biglove2 December 09, 2020
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an imaginary medical problem that is supposed to account for someone talking too much
Man, that guy has a serious case of diarrhea of the mouth. God he is annoying.
by Light Joker January 14, 2005
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1. A term used to describe a person who cannot or will not stop talking, no matter how boring or pointless their topic of conversation is
2. A person who describes to you the antics of their cat, Snowball, until your eyes glaze over
My boss has diarrhea of the mouth; our last conversation involved donkeys, bananas and his obsession with trains.
by Lois the Lane November 02, 2009
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Spilling your beans nonstop to any and everyone who will listen. This especially applies when you're cracked out or tweaked on drugs and feel the need to share every random thought that crosses your mind.

See also chatty cathy.
"Dude, you totally have diarrhea of the mouth. You need to shut up for a bit."
by ariesjow July 28, 2005
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