Bacchanalia (noun)

1. A wild and drunken festival in ancient Rome in honor of Bacchus, the god of wine; an orgy.
2. Any wild, drunken revelry; an orgy.

Origin:

From latin bacchanālia, plural of bacchanālium, from bacchus, the roman god of wine.

Examples:

1. The annual bacchanalia was a wild and drunken festival in ancient Rome where participants indulged in excessive drinking and sexual promiscuity.
2. The frat party turned into a bacchanalia of drinking and dancing.
3. The company's holiday party devolved into a bacchanalia of drunkenness and inappropriate behavior.
4. The artist's work often depicted scenes of bacchanalia and debauchery.
5. The bacchanalia of the 1960s counterculture was a time of free love and drug experimentation.