open mouth, insert foot 

when one slips up in a conversation and eat their own words.

Luke told Jen that she hates Canadians. Jen then told Luke that she is actually a Canadian. Open mouth, insert foot.

I told Sam I'd bang Darren's wife 'cause she is so hot, when Darren was actually behind me the whole time. I practically opened my mouth and inserted my foot there.

open mouth, insert foot by Baz S. December 9, 2007

Open Mouth Breather 

Open Mouth Breather - An individual that breathes through their mouth when not exerted. The individual appears to be, and ususally is, perpetually confused, not very bright, an idiot.

You see someone from Wisconsin driving along. As you pass them you see their profile and their mouth is wide open, an Open Mouth Breather. Although they are looking straight ahead, they don't see traffic stopping and slam their brakes on at the last moment. This is an example of an OMB (Open Mouth Breather)

Open Mouth Breather by Nicholas Esayian November 2, 2007

Open-Mouth Breather

Someone who keeps their mouth open, often with tongue sticking out; appearing mentally deficient. Implying the person has brain damage or is mentally deficient.

All his friends were idiots and morons; the biggest collection of open-mouth breathers I've ever seen.

Open-Mouth Breather by Timbotron3000 May 30, 2006

the always open mouth

The Always Open Mouth is the third album by the Colorado band Fear Before the March of Flames. It was released on Tuesday, September 19th, 2006.

The album marks a very different sound for Fear Before the March of Flames: whereas their previous two albums concentrated much more on raw, powerful Hardcore music, this album contains a much more experimental side, such as more emphasis on antiphony between the lead singer and guitarist; a considerable lesser amount of screaming; layered guitar chords (a second guitarist was added to the band before the recording of this album); and many electronic sounds used with heavily-distorted or otherwise-effected guitars and synthesizers, or sequencers and drum machines, giving it a more Industrial feel. As a result, it is not as hard or fast as their previous two albums, but instead, is more experimental and well-crafted.

The Always Open Mouth is so different from the rest of Fear Before's albums, yet so amazing.

the always open mouth by Tim Nicodemo October 1, 2006

Your mouth is open 

Speaking without authority or unclearly.

Usually used amongst friends, can be a merciful out for a person who starts talking and realizes halfway through their speech that they haven't a clue what the point they were trying to make was.

Your stoned friend who keeps endlessly blabbing on and on about the blue dophins of conciousness holding his eyelids open with a toothpick could be quickly shut up by being told "Dude - your mouth is open!"

Your mouth is open by jjthemick May 18, 2006

Mouth-Wide-Open lip-spreader/mouth-gag

A Mouth-Wide-Open lip-spreader/mouth-gag is a device used in some S&M scenes. A pronged steel cock-ring is inserted into a bottom's mouth and fastened with a leather strap. He's blindfolded and handcuffed and his mouth is now ready for use. After being given 300mg of the boner-maker drug, Viagra, Boy may be forced to wear a cock-cage, leather ball-stretcher and puppy-dog tail

Once, I went to a leather bath-house with Matt, and somebody drugged me and I passed out! When I woke up, several dudes fucked me through the Mouth-Wide-Open lip-spreader/mouth-gag they forced me to wear, and I heard Matt talking, he had fucked my mouth too because I recognized his dick-shape and cum-taste when he shot his load down my throat - I blew my wad through the cock-cage they had on me and they made me lick it up!

Mouth-Wide-Open lip-spreader/mouth-gag by USAF Cadet February 3, 2021

mouth wide open 

A song made by the singer cupcakke called deepthroat she has 4 albums Cum Cake, Queen Elizabitch, Audacious, and STD....😬

Mouth wide open like I'm at the dentists

mouth wide open by Dick_Sucker2023 June 24, 2017