1. "The process of sprinkling cocaine on your breakfast cereal then proceeding to say 'that's what's up' as a comment to anything anyone says to you"

2. A snow-bro idiot who is just really, really stupid. This type of snow-bro will also answer to Johnny Breakfast and ASAP Breakfast
"Machine gun breakfast, you sprinkle too munch cocaine on your cereal!"
"That's what's up!!"
by jvilla423 May 18, 2014
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A karaoke song featured in Yakuza 4, 5, and Like a Dragon.
chi-oku, ni-oku, hyaku-oku no kisu wo abisete yaru babe kono ude daite omae wo nido to hanashi wa shinai
MACHINE GUN KISS de JUST FALL IN LOVE!!!!!!!!!!!! WOWOWOWOWOWWWWWWWWWWWWWWWWWWWWWWWWWWWOOOOOOOOOOOOOOOOOOOOO!
by Lol hi.. September 1, 2021
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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!!
by Le Mao February 10, 2013
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When a man masturbates and when it seems he is finished he keeps going, thus making it hurt, this is machine gun masturbation.
Johnny was so horny he said he was going to use machine gun masturbation on his girlfriends face while she was sleeping.
by Lol'd on your mom October 6, 2006
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A bombardment of explosive farts and shit-projectiles that shoot out of the anus at rapid speeds so fast that if you try to use toilet paper, it will shoot right through it leaving holes with brown rings around it.

-usualy sounds like: "KAck Kack Kack Kack kersplash Kack Kack kack Kack kack"
I was sitting on the toilet and started to freak out as my Ass Machine Gun started annihilating my toilet bowl with the most potent Highpowered shit ive ever smelt in my life.
by JoeyToesy April 13, 2006
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Sending off several text messages in rapid succession without waiting for a reply to one.
My girlfriend is machine gun texting me to death and it is pissing me off
by Sinolop April 14, 2013
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when your crappin and before it comes out you fart a couple times in a row to make a machine gun sound
by jo mamma February 24, 2003
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