for a few guys (usually friends) to take turns having sex with a particular girl in one sexual session

designating or having to do with a form of professional wrestling in which two-member teams compete, with teammates alternating in the ring

When two (or more) males engage in sex with the same person. Although the term originates from a form of wrestling that involves hand slapping a team mate to switch positions, the actual hand slapping may not always be present during sex tag teaming. However, the idea of switching positions during times of low physical or mental energy remains one of the primary traits of sex tag teaming--therefore distinguishing it from other subcategories of group sex.

when you and your friend are fucking two girl bestfriends in the same room

When multiple guys have sex with a girl and tags another guy when a break is needed

Someone who partakes in having sex with multiple men, but at different times. When one gets tired of having sex with the chick, the other tags the hand of the next dude, and the cycle continues. Typically takes place in a tent.

Mans best high five. When two(maybe more) friends use the wrestling style "tag team" high five system to engage in sexual intercorse with a woman. The tagging out could be beacause the men need a break or they have reached orgasm.