Mouthful of chili

When a girl gives a guy head after he had just had vaginal sex with her while she was on her period, and his penis is covered in dried period blood.

"Do you want a mouthful of chili?"

Pansy Mouth

Someone/something that cannot handle extreme/spicy flavors

Jim is a pansy mouth, he can't handle the taste of pepper.

Frog mouth

A derby player named marissa.

Did you see frog mouth at the last game?

Cotton Mouth Killer

Cotton Mouth Killer, or CMK, is an energy drink from Norway. It has blueberry and guava flavour, and is specifically designed to kill your cotton mouth. When your thirst is dire - an ice cold can of Cotton Mouth Killer extinguishes it like an ocean hitting a fire.

Thirsty guy: "Dude. My mouth is so dry. I would pay such large amounts of money for a delicious bevarage right now."
Friend: "Have a CMK, bro. Cotton Mouth Killer will quench your thirst."

mouth-ass

The term for someone who is metaphorically speaking bullshit, or nonsense.

Me: What the hell are you doing mom? You didn't give me enough grape soda!
Mom: Stop bein' a frickin mouth-ass.

mouth woo

Making out with another human.

Dude I mouth wooed her last night.

Mouth Piñata

When a man, or woman, stuff their mouth with semen or other tasty treats, and others take turn using their penis to smack the "treats" out the persons mouth for all to enjoy.

We got so drunk last night we ended up playing Mouth Piñata until a huge rod busted open their mouth to release all the goodies inside.