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The act of saying something completely inappropriate unintentionally. This is for scenarios where it is greater than mild word vomit and happens with more information that has somehow fallen out of your mouth.
Girl 1: I don't know why Jordan has been acting so weird. It's probably because he loves me and is feeling embarrassed about it.
Girl 2: It's because he slept with me. And he thinks you're crazy. And annoying. And he is scared that you will like, kill him if he says anything. And he's been cheating on you with practically everyone we know, for like 2 years. Oh crap, I didn't mean to tell you any of that. I just had mouth diarrhea.
by PLBB782 July 11, 2008
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May 12 Word of the Day
When someone goes to the gym and spends 90% of the time on their phones scrolling through social media
Looks like its thumb day again for Jimmy with his usual routing... 3 sets of 5 snapchat selfies and 10 sets of scrolling through facebook until exhaustion
by Gary br April 02, 2017
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The inability to control what words come out of your mouth. Wether they be harsh or not
Bro i just had mouth diarrhea i told erika that she was a slut
by Miss. Mayhem017 September 04, 2019
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When you are trying to say something fast but the words clump together, becoming incomprehensible
"Hey I was thinking about that time when we were kids and wewenttothepark. Sorry. I get mouth diarrhea."
by RedRannon September 04, 2019
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Mouth Diarrhea occurs when you are eating, and someone makes you laugh. You are unable to swallow due to the fact that you are laughing. Food then spills out of your mouth along with any saliva in your mouth. Often the food will be discolored and mushy.
**Two people at restruant
Girl1: And then like, she freaking jumped in front of the car!!

Girl2: OH MY GOD! *laughs uncontrollably*

Girl1: Wow...Nice going. That's some pretty severe mouth diarrhea lol
by Sister Nightroad March 19, 2009
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