A girl, usually slutty or skanky, who shows up at parties without receiving an invitation.
Person 1: Who the hell is that uninvitee?
Person 2: Oh, the red haired slutty chick?
Person 1: Yeah.
Person 2: That's Lindsey Hickle.
Person 1: Damn, I think i'm gonna need heavy duty plastic wrap before running my nob into that crab cake.
When a person, usually a douchebag, invites themselves to one's house or event without asking or being invited.
Person 1: Man, Lindsey Hickle came over to my house again yesterday!
Person 2: What an uninvitee...and a whore.