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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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 9, 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 15, 2005
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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.
by Biglove2 November 25, 2020
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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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1. a condition where some obnoxious bozos are always throwing their weight around and belittling all those who don't agree with them. Such people think they "know it all" about everything when they really know zero because everything they say is a load of crap.

2. a similar condition where someone cusses way too much because he/she thinks it's "cool" but it really makes said person look like a stupid juvenile fool.
1. today in this age we are swamped by a lot of people who have diarrhea of the mouth.

For example, certain politicians wasted time and money holding sessions geared strictly to determine if an opposing party should be labeled as "socialist". They don't even know what socialism is, and there's too many problems that require remedial action NOW. These dunderheads got a case of petty stupidity. There's no time for it now.

2. On an ICP album and one by Limp Bizkit there are songs that actually tell you how many times they use the word "fuck". It's over 80 times each! Now that's a case of major diarrhea of the mouth.

3. Lee is watching TV and an ad for some airline is on. The host just keeps on blabbing on and on. He's offering reduced air travel rates only IF Lee schedules his flight on certain times of day, on certain days of the week, using a certain credit card, showing proof of ownership of a new Subaru car and he must've kissed Marilyn Monroe. So many conditions! Lee thinks that the ad host has diarrhea of the mouth - all he's saying is total SHIT.

4. Kid Rock should be renamed Kid Ego. He's got absolute diarrhea of the mouth.
by I Saw U2 Live Twice May 24, 2009
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