A party held to celebrate a person's birthday.

plural of party foul

Misspelling of party hearty.

A party where the only clothing worn is pants (i.e. a shirtless gathering). / (by extension) A clothing-optional party, where the intent is to engage in sexual activity.

(Singapore) A party for expatriates at which all the guests wear sarongs.

plural of party-hearty

(idiomatic) the party where teenagers or young adults bring with them a lot of random pills, take them, and see what happens

Used other than figuratively or idiomatically: see come, party. / (informal) to agree to an outcome, to get on board.

A party where guests bring and consume their own bottles of drink.

(colloquial) Any of various recreational drugs, especially those whose main ingredient is benzylpiperazine.