A word that commonly refers to the group of Youtubers known as KickthePJ, AmazingPhil, crabstickz, and danisnotonfire. They make pretty much the best videos you'll find on YouTube, so you should probably check them out.
Friend: So, want to go watch some of The Fantastic Foursome's videos?

Me: Of course! What else would I be doing with my time?
by starsintheireyes August 15, 2012
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A Conrad foursome occurs when two couples hook up in the same room. A common misconception is that a Conrad foursome is an orgy, but as long as the two couples remain separated and each hookup is its own separate entity, the integrity of the Conrad foursome perseveres.
"I heard he had a Conrad foursome with his girlfriend and Julie and Bob last night."
by jordanplusandy July 23, 2009
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A monthly sleepover consisting of Charlie, Natalie, Ava, and Sophia.

Foursome sleepovers follow many traditions such as, blasting Pink Guy , watching weird cartoons, family dinners, getting drunk and crying, falling asleep listening to Lets fighting love, and doing satanic rituals.

The best Foursome sleepovers are at Debis house or in a tent.
Oh no, the foursome is having another sleepover.

The neighbors filed a noise complaint during the foursome sleepover when they wouldn’t stop screaming Nickelodeon girls.
by plasticlown July 6, 2019
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Its when you (pee) first and then masturbate, them (pre cum) cums out, after that you get (cum) outta your dick, then while recovering from ejaculation the white stuff that cleans your pipe come out.
Dude: dude yesterday i had a FOURSOME EJACULATION, it felt weird and amazing at the same time.
by MLONE January 5, 2019
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A game played when you invite three girls / guys that are interested in you to the same event. Make sure that at least one of them is crazy. Get them all to interact, then watch the show.
Person 1: "Do you realize that three of your exes are coming to the party to see you?"

Person 2: "Shitstorm or Foursome"

Person 1: "Get it."
by TheTimothy October 29, 2011
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When an extremely fortunate woman gets the privilege of engaging in sexual intercourse with three males from the three prairie provinces (Alberta, Saskatchewan and Manitoba).
"Hey Loralee, how about about a prairie foursome?? I'm from Berta, Colter's from Sask and Brendan here is from Manitoba."
by walkerbalan1 February 26, 2020
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A session of sexual activity involving a male, his spouse, and a lesbian/bisexual couple.
Dude, three chicks? I can't believe you pulled off a Devil's Foursome!
by arthur4 January 28, 2009
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