If somebody you don't like is driving, and you don't want to sit "shotgun", now you can call "not-gun", and get the privilege to ride in the back seat, and avoid the awkwardness of shotgun with that hated someone. Not-gun comes in handy when carpooling, or having to go somewhere with a dean of your school...really helps to avoid awkward situations.
Who's driving? I think Sean is driving. Okay, then I call not-gun!
by Steven Obander February 22, 2009
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The act of foisting a responsibly onto somebody else.

To be the last person in a group of people to cry "Not-Gun" will result in having to perform the task that needs doing.
by beau.sinko July 10, 2009
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Originally used by pilots to alert their wingmen/AWACs that they are in dogfight range and firing their cannon as opposed to their longer-ranged missiles.

Used by young adult males to alert their wingmen that they are breaking away to engage a target female at close range.
John: KAKOW! Hotties at 11 O'Clock... I got the one with the weater hogs...

Jack: When? What the hell are you talking about?!

John: Guns guns guns!

Jack: Dude, where the hell are you going?
by tunnelr@ February 15, 2010
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Guy 1: Hey, I got a gun!
Guy 2: Are you an American?
by ESU02 April 28, 2021
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The greatest thing you can bring to show and tell.
"He has a gun!"
"AHHHHH"
by Rina Glass September 20, 2021
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A complex arrangement of metal parts that is capable of discharging a lead peice at very high speeds, high enough to penetrate fleash and thin slabs of wood. Serves as humankind's (so far) permanent replacement for spears, staffs, swords, daggars, etc. as most effective weapons. Most commonly used for self-defense, murder, killing hostiles, recreational shooting, the standard issue weapons for armies, militias, etc.
Guns aren't the problem. It's criminals, irresponsible people, and totalitarian shitheads getting a hold of them that's the problem.
by Mob_Triggerman November 29, 2004
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