When multiple partners, usually 3 or more, engage in sexual intercourse with a single willing partner. (If partner is unwilling it is called gang rape).

No Bull Shit, and old hacker acronym which is usually used to signify that the talk will be serious.

When I get fucked by 6 or more guys at once.

1. When a street gang finds a random person on the streets and beats the ever living hell out of him. Usual ending with the removal of the victims shoes which are then strung from power lines.
2. When any one person of either sex has intercourse with three or more people at once, consensual or not (usually the latter), and is the sole receiver.

when a slut gets more then 4 cocks at a time, by sukcing and fucking them until she is covered in jizz.

When one, most often a female, gets sexual pleasure from more than 2 penis's.