foam at the mouth 

1. to be absolutely furious

2. to be sexually excited

2. to be overly excited about anything

Why is it that you always foam at the mouth when you see that cheerleader?

foam at the mouth by The Return of Light joker March 15, 2011

smart mouth

Someone who is very selfish in the way that they speak. They don’t think before they speak and it’s usually passive aggressive or rude

Jena: that’s a pretty outfit “sarcastically”
Steve: shut up Jena just because you’re poor
Jena: don’t start with me smart mouth

smart mouth by Itsactuallyjesus August 4, 2019

all mouth 

All talk and no action.

<@Peter> If you talk one more time I'm going to kick you.
<@Dave> Do it bitch.
<@Peter> ...
<@Dave> You won't do it, you are all mouth.
** Peter has quit.

all mouth by TheLondoner December 14, 2008

cock in the mouth 

To have oral intercourse with someone (see citm)

Since you are on the rag, how about a little cock in the mouth?

cock in the mouth by Merkin March 24, 2005

get out of my mouth 

A phrase used to reprimand someone who intrudes on your business while you are A)in a conversation or B)eating.

Mr. Stevenson: Tasha, can I trouble you to please gossip on your own time, and not in my class?

Tasha: Mr. Stevenson, can I trouble you to please get out of my mouth?

get out of my mouth by Brent January 30, 2005

muppet mouth 

When a woman's outer labia come together to cover her inner labia, and resembles the mouth of a muppet.

That girl's pussy looks like a muppet mouth!

muppet mouth by Diddles Crew March 26, 2007

Meth Mouth 

When someone smiles at you and has no upper front teeth. Typically accompanied by sun wrinkles and long stringy hair. These attributes are often associated with the side effects of excessive use of Methamphetamines.

Many people featured on Dog the Bounty Hunter have a serious case of meth mouth.

Meth Mouth by Raymond Black March 23, 2010