Top Definition
A person, who usually isn't very intelligent, who will not shut up. It's typically a cover for their own inferiority.
Damn, shut the hell up dude. You sound like Dabo Swinney with all that diarrhea of the mouth!
by C-dog73 June 15, 2012

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When someone won't STFU and keeps blabbering their inane chatter.
See RuffBuff.
by All of RedOut.org September 25, 2003

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Talking too much, usually about something unimportant.
Susie has diarrhea of the mouth.
by Shawn B. April 14, 2003

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constant talk with no information value. unstoppable talking. saying alot but saying nothing at all, not to be confused with saying alot by saying nothing at all. meaningless and unstoppable talk. drug-induced chatter. politics. barf.
That girl has a serious case of diarrhea of the mouth
by Tomsoma March 22, 2003

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When someone won't STFU, and he doesn't realize that everyone stopped listening a long time ago.
Aerofan thinks he sounds intelligent by padding his speech with a ton of words. But we know the truth. He's only compensating for his small penis. He has diarrhea of the mouth. SHUT UP!
by justahandle2007 January 17, 2007

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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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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

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Someone who can't stop talking.
Joe Shmoe: Billy must have diarrhea of the mouth.
Bob: What do you mean?
Joe Shmoe: He won't shut up!
Bob: Ohhh.
by Bagdaddy May 29, 2006

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

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