3 or more people having sex. Usually requires at least one male. Sometimes used just for something funny to say when a group of people leave together and you don't know what they're doing.
This is a real life example, with some names changed.

Jane, Anna and Betty leave the room to go to the bathroom.

Bob: Are they going to the loo AGAIN?
Chloe: They're probably having a gangbang.
Bob: But don't you need a cock for that? Or did they bring a dildo?
Me: You sick minded freaks!
by FayeWillGlompifyYoo October 03, 2006

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When 3 or more Africans get together and beat a drum continuously.
Oh boy that was quite the gang bang last night!.
It sure was!.
I can't believe we gang banged that drum with that many people last night!.
by 2Spooky4You! November 23, 2015

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To be involved with a gang, selling drugs, jacking/robbing people, shooting/killing other gangbangers, and dealing in weapons.
"I'd be careful if you're lookin' to pick up around Crenshaw Blvd., most of the dealers around there are Gangbangin"

"A lot of the kids around here Gangbang right out of high school"
by SlidewayzS13 November 15, 2008

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A MacDonald's Double cheeseburger with a Junior chicken pattie in between the patties.
i asked the lady at MacDonald's for a Gangbang and she gave me a palfreyman.
by softchews August 18, 2009

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Can be done by any combintion of races but most of the time it is a white girl with black men. Can be white on white, black on black, or mexican on mexican, but most commonly black men on a white girl.

A gangbang is where 4 or more men get with a girl and they start to have sex with her at once it has to have double penetrations to be a gang bang. Commonly after servel gang bangs the girl will start haveing train bangs run on her and will get a tramp stramp.

Commonly confused with a train bang but a gang bang only goes up to 6 men and has to have DPs to be a gangbang. Where about a train bang is 7 or more guys.
OMG after being gangbanged by half the black football team in collage becky became a total slut haveing gang bangs and and trains run on her daily she even has a stamp tramp to prove it. She really just white meat on black street now.
by tiff6969 December 16, 2009

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When a group of four or more dominant (top) men gratify themselves sexually utilizing a single submissive (bottom) male. Generally repeatedly climaxing and giving facials to said bottom. The dominant men will verbally encourage one another and degrade the bottom.
Guy 1: This boy is totally going to take all 10 of us tonight.
Guy 2: Yeah that boy is totally going to get gang banged!
by gay_frat_boi January 14, 2009

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Besides the sexual orientation, gangbang can also relate to "a group of people ganging up on one person and owning them". The person may have taken care of one, but could not take them all on.
That guy in Counter-strike just got gangbanged by the other team.
Paintball isn't any fun when you get gangbanged.
by ViTium May 25, 2005

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