Second Mouth 

A vagina / minge / cunt / meat sleave / clunge / fanny / gash / vag / snatch / muff / pussy.

Your girlfriend gave me head with second mouth.
(Your girlfriend gave me a blojob.)

Second Mouth by BigManFred December 25, 2019

drunk mouth

when one has had too much to drink, and one talks all kinds of stupid.

Henry had drunk mouth last Thursday night; it has cost him some friends.

drunk mouth by John Wordsleuth March 2, 2020

Cookie mouth 

The resulting chocolate coloured ring that appears on the lips of the participant of an ass to mouth incident after they use their lips to clean all the feces from the shaft. Reminiscent of all of your annoying cousins after they have eaten your Oreos. The severity of cookie mouth varies with diet, shaft size, and enthusiasm and lip colour of the shaft swabber. Is somewhat contagious as kissing can spread cookie mouth between partners.

I went ATM on this chick last night and she ended up with the worst cookie mouth I have ever seen.

Cookie mouth by Amebo Jones March 25, 2020

Big Mouth Paradox 

When children in a show sound like grown adults.

Steven Universe suffers from the Big Mouth Paradox

Big Mouth Paradox by Skelecool August 25, 2020

Guppy mouth 

That funny face you make that looks like this :{

She had a guppy mouth when she saw something awkward yesterday.

Guppy mouth by Ed talk October 20, 2020

smashing mouth 

To perform oral sex on someone; giving a blowjob.

Dude, you should have seen her smashing mouth the other night.

Mmmind if I smash mouth?

smashing mouth by hambogey October 25, 2020

Mukbang Mouth 

Turn of phrase meaning someone who consumes food and drink in a manner that is incredibly displeasing to hear. Typically loud smacking, slurping, or wet sound produced from mastication done from open mouth or loud eating.

Origin: Many mukbang youtube creators increase the gain on their microphones so you can hear them masticate.

Alan, can you please close your mouth when you chew? You have mukbang mouth you slob.

Mukbang Mouth by SeraChimera February 13, 2021