A fourway is when two couples share their partners with each other. A bit like a foursome but not all participating in the 'activities' at the same time.
Hey dude, did you hear about Cindy and Bob having a fourway with Betty and Ken?
by 123Anonymous12333 March 14, 2010
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The act of having sex with a person on top of two additional people, with or without consent, but considered to be in the merger even though they are not active participants. This may also be referred to as a "Great Moment in Hook-Up History", when the two people are would-be cock blockers
"That night, Bobby and Gina had drunken sex on top of her two passed out friends, making it a technical fourway"
by Uber Tuber November 17, 2006
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Noun, activities associated with sex in which two people have sex next to, under, or on top of two other people.
Josh and Lisa had a technical fourway, his roomies, Marc and Ryan watched!

Matt and Kevin were fucking while Josh and Lisa were felching next to them, it was a technical fourway!

Matt, Kevin, and Josh were circle jerking, while Lisa watched, what a technical fourway!

by suite1157 March 4, 2007
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A cyber or phone meeting between two people who are both simultaneously engaged in live sexual activity with two other people. The sexual energy from each couple adds to the arousal of the other couple.

Why don't the two of you get on your cam so that you can join us in a Transcontinental Fourway?
by manshagmanshagman September 21, 2006
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Noun, activities associated with sex in which two people have sex next to, under, or on top of two other people.
A technical fourway happened in my dorm room!

Josh and Lisa had a technical fourway, his roomies, Marc and Ryan watched!

Matt and Kevin were fucking while Josh and Lisa were felching next to them, it was a technical fourway!

Matt, Kevin, and Josh were circle jerking, while Lisa watched, what a technical fourway!
by suite1157 March 9, 2007
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A foursome with three girls and one guy
Did you hear about the cheerleaders having a heaven's fourway
by The dr22 January 22, 2017
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A sex position between four men, only possible in Outer Space or another Zero-Gee environment. Each man must be of an equal height and with similar body proportions. Most importantly, their penises must be of equal length and erections must stick straight out. Each man arches their back forward 90º and penetrates the anus of the man in front of them. When the fourth man penetrates the first man, a Fourway Sodomy Wheel is formed, in which all four men are simultaneously fucking and being fucked by eachother.
Elon Musk built SpaceX not on the dream of colonizing Mars, as he has falsely stated before, but to make the Fourway Sodomy Wheel a more viable sex position.
by thereppy June 25, 2017
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