Top definition
An affliction where one has the tendency to slip up in a conversation and eat their own words.

see: open mouth, insert foot
I accidentally insulted Joe's mom right in front of her. I think I have foot-in-mouth disease.

Most politicians suffer from foot-in-mouth disease; they make promises that they never keep which eventually bites them in the ass.
by Baz S. October 04, 2007
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2
An affliction that often occurs to people who chronically don't think carefully enough about what they are saying in a conversation. Saying something thoughtless that might hurt another's feelings is something we all do occasionally, but if it happens more than once or twice per month, you might have foot-in-mouth disease.
When Bill dissed his sister's new boyfriend to his buddy Richard, he didn't bother to look around and make sure she was out of earshot. Richard said, "Damn, Bill, she's in the kitchen only a few feet away! D'ya got foot-in-mouth disease or somethin'? "
by Jori Atoz April 25, 2016
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3
A description about one who has a habit of putting their foot in their mouth. From Foot and Mouth Disease.
"Oh, Geez, I'm sorry!" Bob said.
"You've got foot in mouth disease today, don't you?"
by armina August 10, 2005
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4
Chronic misuse of slang,and grammatical errors when speaking.
Wow ,Jessie's speech sure was a foot in mouth disease disaster!
by Violet Skye's October 15, 2016
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