mouth off

to speak out of turn; to backtalk

that bitch has a reputation four mouthing off at the worst possible moments, I should cut her throat before she says any other stuff!

don't mouth off at me, you fuckin prick

by biancavittoria February 10, 2014

mouthing off

when you start swearing and saying all this crap to someone

That guy Marc was really starting to tick me off, so i started mouthing off

by Kayla May 8, 2004

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.

by Your Cats On Fire! January 3, 2010

Jerking your mouth off

When all someone does is talk shit and the more they do the more toxic waste comes out.

Guy: I can't stand John Walsh. All he does is talk about fugitives being on the loose! He needs to get a life!

Girl: Quit jerking your mouth off. I can smell the shit when you open it.

by Luna Belle December 11, 2009