AFIMD [Anti-Foot In Mouth Device] 

The part of your brain which kicks in at the last second and prevents you from saying something incredibly stupid.

He was about to ask her about her pseudopregnancy, when his AFIMD Anti-Foot In Mouth Device kicked in and closed his mouth for him.

AFIMD [Anti-Foot In Mouth Device] by Thinkingman.com January 21, 2011

Foot in Mouth 

Donald Trump

yo dude, did you see that speech where Donald Trump (aka donnie troomp) put his foot in mouth? he said “this is a great day for George Floyd”... wtf

Foot in Mouth by joe exotic’s left elbow June 7, 2020

foot in mouth disease 

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?"

foot in mouth disease by armina July 23, 2008

foot in mouth disease 

Chronic misuse of slang,and grammatical errors when speaking.

Wow ,Jessie's speech sure was a foot in mouth disease disaster!

foot in mouth disease by Violet Skye's October 15, 2016

man foot in mouth disease

When a dude says something stupid.

Dude said some really stupid stuff to her- has a case of man foot in mouth disease.

man foot in mouth disease by Jammer2014 January 28, 2014

put your foot in your mouth 

Saying something that makes a person feel pain or embarrassment.

I had to second-guess you for a while for putting your foot in your mouth.

put your foot in your mouth by Mr. Terrence L. Trezvant April 27, 2005

sticking his foot in his mouth 

To regret saying something harmful, insulting, or stupid to someone

Kyle : How is John doing?
Sarah: He has been dead for 5 years now
(Kyle is sticking his foot in his mouth) not literally

sticking his foot in his mouth by SlickNick6497 November 19, 2013