Kicking the wolf in the mouth 

when you're generally hungry as hell, usually after a long night of drinking

Man I was out partying all night and woke up kicking the wolf in the mouth

Kicking the wolf in the mouth by jakeinkalispell September 17, 2010

I threw up in my mouth a little bit 

A statement for being disgusted or grossed out or showing people you are disgusted.

Sorry I threw up in my mouth a little bit

I threw up in my mouth a little bit by reesha2282 April 16, 2019

Softer than the inside of a snail's mouth 

An expression that describes when something is so soft it is delightful.

Person 1. Feel this new robe I got.

Person 2. That's softer than the inside of a snail's mouth.

Softer than the inside of a snail's mouth by Medlinmatt May 18, 2021

Don’t look a gift horse in the mouth! 

A saying when someone gives you something useful but you don't like it at all and you would like to have something better for you .

In the past, when buying a horse, people looked to see if it had healthy teeth.

Dad: „I will give you my little car for your birthday.“
Daughter: „But I don’t like it! I’d rather like a big car!“
Dad: „OH, c’mon! Don’t look a gift horse in the mouth!“

Don’t look a gift horse in the mouth! by Jay Gee Pee May 28, 2022

a bad taste in my mouth 

an ex that u wish u never dated

jimmy is a bad taste in my mouth

a bad taste in my mouth by ibk December 12, 2006

Butter Mouth 

When you are high and it feels as though you have butter or peanut butter on the roof or your mouth.

"whoa, dude I got really bad butter mouth!"

Butter Mouth by xxSlutxx March 5, 2007

trench mouth

Terrible bad breath! The kind that is so horrible it makes others turn away when you speak to them.

Bob's trench mouth made my eyes water.

trench mouth by 9key October 18, 2004