Morning mouthwash 

A morning mouthwash is when a person wakes up another one by spunking in their mouths leaving a morning mouthwash

Guy1: I totally gave him a morning mouthwash this morning

Guy2: damn bro that’s nasty!

Morning mouthwash by Frank Reynolds has aids September 14, 2018

Portable mouthwash

If you're thirsty, find yourself a squirter. Collect, Bottle, and save for later.

Portable mouthwash always quenches my thirst after a long run

Portable mouthwash by Farkle Safari January 4, 2019

Lagoon Mouthwash 

Lagoon Mouthwash-
When one person receiving oral, pisses down the throat of the person giving, and that person precedes to vomit up the piss onto the receiving person’s penis.

Person 1: It’s been a while since I’ve gotten Lagoon Mouthwashed.

Person 2: What’s that?
Person 1: Oh, oh buddy..

Lagoon Mouthwash by Tangerinebee March 12, 2020

Methane Mouthwash 

When you drop your drawers and bare-ass fart into your sleeping friend's open mouth as they are breathing in, causing them to jump awake and spit.

Dude, John is passed out with his mouth wide open. You should go and give him a methane mouthwash and see how fast it makes him stop snoring!

Methane Mouthwash by Mr. Led Zeppelin March 21, 2020

Mongolian Mouthwash 

A male peeing into a female’s mouth.

My husband gave me the ol’ Mongolian Mouthwash now I’m pregnant with Martians. Elon Musk help me!

Mongolian Mouthwash by Wayne0keefe April 4, 2021

Bong Mouthwash.

Bong MouthWash :
When you swish the bong water in your mouth like mouthwash.

Stoner: Bro, I forgot to bring water to my smoke sesh, and my mouth was dry as a camels pussy.
Stoner #2: And?
Stoner: I had to Bong Mouthwash.

Bong Mouthwash. by MegaMilky April 28, 2021

mudman mouthwash 

A lean-like drink that makes you really high

Ingredients:
Colgate
Piss
Milk
Lemon juice

me and the homies gonna drink some mudman mouthwash

mudman mouthwash by Jjjjjwi March 8, 2022