Wiktionary
partier
n. One who party.
Usage examples of "partier".
That captain had been a drinker, a partier, with a mistress in every port.
One-eyed alligators and bleary-eyed partiers probably ought not to commingle, but through the years El Presidente and her fond admirers had no problems.
And when they drop the partiers off at the island, she gets to take off in that boat with ten beautiful men!