Also meaning a person who's life is centred around giving people the impression they are a popular party animal to the point where they are neither living nor dead because everything they do is fake and aimed at creating this image.
Often Party Wraiths have no genuine friends and maintain only the ghostly imitation of superficial friendships in the hope of hearing of upcoming parties and inviting them self.
Like a wraith envies the living a Party Wraith envies those with real friendships who get invited to parties without having to invite them self or cultivate a fake image and appear popular.
Hank: Yeah sure thing...
Gordon: (interrupting) HEY GUYS, LONG TIME NO SEE I HEAR YOU'RE HAVING A PARTY?! IS THERE A PARTY? IS THERE? MAN IT'S GONNA BE A GOOD PARTY, I'LL BRING SOME BEER.
Hank: Man, Gordon is such a fucking party wraith.