party monstern. a person who parties frequently and without restraint, typically to excess; cf. slightly earlier party animaln.
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1983 National Lampoon Aug. 16 To be truly effective supremo, one must also be a party monster.
2003 Liverpool Echo (Nexis) 17 Feb. 43 I thought we were Generation X—no wars, no wives, no babies—just ecstasy-fuelled party monsters on the happy road to nowhere, forever.