Orgy

In common use, an orgy is when more than two people have sex together, sometimes also called group sex. This dates back to prehistoric ages, recorded in many ancient civilizations.

There is also the alternative metal band Orgy (band).

A fresco in the Roman city of Herculaneum, showing an orgy

Illustration from De figuris Veneris by Édouard-Henri Avril—orgy scene or orgy fantasy

Orgy could also mean any activity done without limits.

Originally, the word comes from Latin. There it referred to a feast (or a banquet) of a rich citizen. When the Romans ate they were almost lying down, and the food was brought to them by slaves. These slaves would also provide the entertainment which usually consisted of music and dancing slaves and sometimes sex slaves.