Compound word - party with a few intimate associates taking place after the main party, usually in a different location but peripherally related to the main party.

Voluntarily Celibate.
A person who chooses to be celibate. Can be for any given amount of time, for a short period or for their entire life. Can be for religious reasons or not.

related: incel

Generally coming from Hollywood slang for a better, more fun party, occurring after another, more boring, party.
May also be used to describe activity that occurs after the club/bar scene is closed for the night.

Usually a bunch of people congregating in a stranger's house after a real party or rave ends (or gets busted). Sometimes there's more music and booze, but it mostly consists of random people in corners coming down off of some good rolls, or having sexual encounters in the single dingy bathroom.

a party that occurs after another party.

A party after a party, a party when girls and guys get naughty and have drugs.

All back to mine!
Post clubbing / party piss-up at a separate location, but involving at least some of those involved in the initial party.