saturnalia

The ancient Roman seven-day festival of Saturn, which began on December 17.

A celebration marked by unrestrained revelry and often licentiousness; an orgy.

In Roman antiquity, the festival of Saturn, celebrated in the middle of December as a harvest-home observance. It was a period of feasting and mirthful license and enjoyment for all classes, extending even to the slaves.

Hence Any wild or noisy revelry; unconstrained, wild, and licentious reveling.

The festival of Saturn, celebrated in December, originally during one day, but afterward during seven days, as a period of unrestrained license and merriment for all classes, extending even to the slaves.

Hence: A period or occasion of general license, in which the passions or vices have riotous indulgence.

A period or occasion of general license, in which the passions or vices have riotous indulgence; a period of unrestrained revelry.

a wild gathering involving excessive drinking and promiscuity

an orgiastic festival in ancient Rome in honor of Saturn