potty mouth 

Someone who likes to swear and cuss just for the fun and bravado of it.

Don't speak to me like that, you potty mouth.

potty mouth by David from Kingsbury November 8, 2003

Sailor's Mouth 

The habit of using speech containg profuse amounts of curse words and other offensive language, due to time spent in the U.S. Navy.

This is common speak in the Navy, but may be frowned upon elsewhere.

sailor 1: hey bit**, what are you doing for lunch today? want to go get some fu**in' sh**donald's?

civilian friend: whoa dude, tone down your sailor's mouth. and yes, i would love to go.

Sailor's Mouth by Sailormanbananaton March 23, 2011

foot in mouth 

when one accidentally says something offensive or stupid

example 1:

amy: "she agrees with me, see you're in shape! finally someone who agrees with me"

norman: "who disagreed?"

example 2:

andrew stone: "your mom is stupid"

david: "your mom is fat"

(person's mom walks in, and heard him put his foot in his mouth)

david: "oh,... uhm hi Mrs. Stone"

example 3:

little kid's mom: "i feel bloated"

little kid named ben: "its okay to be fat when you're old"
(little kids are usually excused from foot in mouth because of their ignorance and innocence)

foot in mouth by eeeeeeoooooop August 1, 2012

poop mouth 

An insulting term used to refer to a person who frequently employs foul language.

"Why, Ron, Why? Why did you say those things...you, you nasty poop-mouth. Poop...Poop mouth, get that poop out of your mouth" "Garth, If I gave you some money out of my pocket would that help ease the pain?"

poop mouth by Michael McG April 8, 2008

Stench mouth 

Severe bacterial halitosis. The odor can be duplicated by mixing equal parts fish heads, peanut butter, and cat feces with a package of yeast and leaving the mixture in the hot sun for several hours.

"Betty sure is a cute girl, but her stench mouth could set off a smoke alarm."

Stench mouth by von savigny November 6, 2008

DIARRHEA MOUTH 

ONE WHO CANT SEEM TO KEEP HIS/HER MOUTH SHUT OR KEEP A SECRET TO SAVE HIS/HER LIFE!!

DID YOU HEAR ABOUT BETH GETTING AN STD FROM JOHN? YEH MICA AND HIS DIARRHEA MOUTH TOLD EVERYONE IN THE ENTIRE SCHOOL!!

DIARRHEA MOUTH by MARVELOUS INSANE CRAZY AMAZING March 28, 2009

Slayer Mouth-off 

When two hardcore metalhead slayer fans argue, possibly for hours, about how much they know about slayer ect. it is a diverse bonding ritual of slayer fans, when they feel threatened by another slayer fan. slayer fans don't usually like other slayer fans.

typical slayer mouth-off..

slayer fan #1: how many slayer tee shirts do you have?
slayer fan #2: 5. how many do you have?
slayer fan #1: 5. how many slayer albums do you have?
slayer fan #2: all of them. how many do you have?
slayer fan #1: all of them including the one that they never actually released. i had to drug Tom Araya to get it..
slayer fan #2: well i have the limited edition slayer action figures!!!
slayer fan #1: how come i'v never seen them in your room?
slayer fan #2: because i hide them under my bed!
slayer fan #1: fuck you man, you just dissed slayer i'm gunna have to kill you.
slayer fan #2: *brutally mutilated* lets put on some slayer.

Slayer Mouth-off by Your Cats On Fire! January 2, 2010