diarrhea of the mouth 

a. where someone who is full of shit, usually a homeschooled student, who has no social skills says stupid crap that makes you want to slap that person and ask them why they are so dumb. Cured by shutting the hell up.

b. a lapse of the brain, resulting in duh de duh. Otherwise referred to as a JT moment.

God, Kevin has diarrhea of the mouth. He just opens his face and stupid crap just sprays everywhere.

diarrhea of the mouth by Scottie does know December 28, 2005

diarrhea of the mouth 

When you can not stop talking for nothing. When you just go on and on and on.

Mom caught me sneaking in last night. I started lying to her and I just had diarrhea of the mouth.

That lady had diarrhea of the mouth. She would just not shut up.

diarrhea of the mouth by Boobralicious July 20, 2009

diarrhea of the mouth 

when you use a bunch of curse words, similar to Tourette's syndrome or when you spread a lot of gossip.

Guy: I can't believe you went out with that asshole. He is such a player!

Girl: At least I don't have diarrhea of the mouth!

diarrhea of the mouth by Jaeda June 15, 2008

diarrea of the mouth 

to take meaningless words that you think have something to do with one another and place them into phrases no one can understand and then be asked to repeat them; to suffer ultimate humiliation in front of a class

My definition might be considered diarrea of the mouth.

diarrea of the mouth by liz young December 14, 2008