Short for "shut your mouth or feel like a trout" which is a derivative of "You had better shut up unless you want a pocket full of water"
Hey P why don't you hurry up?
P: "mouth or trout"
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Someone or somebody who has a machine gun mouth babbles idly and rapidly, to some extent, non-stop.
A person with a machine gun mouth is very annoying that you feel like wanting to punch his or her face to make him/her stfu.
YouTube video guy whom speaks very fast: Hello. Today I'll be showing you how to look more dapper........(10 minutes later)............so that you will be fancied by girls around you.
Me: Oh shit! I don't get what he is trying to say, this machine gun mouth guy!!
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Phrase used by people who don't actually know how to review food, but want to describe something that tastes good.
"Derek! Try this turkey, it just melts in your mouth!"
"Oh wow, this ice cream just melts in your mouth..."
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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.
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It is where you will take any cock into your mouth whether it is a salty cock or a normal donger.
Woman 1: Did you watch 50 shades of gray?
Woman 2: Yeah, the girl must have had dick in mouth disease.
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a food so good it is like an orgy in your mouth. popularized by stewie griffin.
me: oh this is like an orgy in my mouth!
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The tooth fairy's evil sister. She visits people sleeping in the middle of the night and gives them horrible morning breath.
Ergh, I've had a visit from the Shitty Mouth Fairy.
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