Noun

1. A person known for frequent, enthusiastic attendance at parties, especially one whose partying behavior is exuberant or excessive.
   • 1987, R. Z. Sheppard, "Yuppie Lit: Publicize or Perish," Time, 19 Oct.,

     . . . Tad Allagash, a stripling adman and Manhattan party animal with inexhaustible supplies of Bolivian Marching Powder (coy for cocaine).