1 definition by Uber Tuber
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