uninvitee 

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.

uninvitee by j-wig August 7, 2006

uninvitee 

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.

uninvitee by somefilipinokid August 10, 2006

Showing up uninvited 

in internet parlance, meant to convey the appearance of an unwanted or undesirable group of people that you weren't seeking out in the first place.

There was an interesting discussion about how to save up for retirement, but then all these bitcoin bros started showing up uninvited.

Showing up uninvited by JuliusCesarus July 11, 2021

Uninvite 

When someone initiates an invitation to someone for an event without crucial information. The person invited is led on to believe they are actually going to attend the said event, and is unable to attend due to intentional avoidance and/or disinformation.

Frank, "Hey Jon, Why didn't you go to the party last Friday?" Jon, "I was uninvited by everyone on facebook, so I didn't know how to get there."

Sally, "Hey Tam, Pat wants to come with us shopping on Saturday. Should I uninvite that hoe?" Tam, "Yeah, tell her to meet us at the mall on Friday."

Uninvite by Artificer January 1, 2011

uninvited guests 

Any creature that chooses to make its home in a hard to reach area in your house. Be it in the attic, basement or inside a wall, these guests are often rodents, reptiles, or insects of varying sizes. Once discovered, uninvited guests are very hard to evict from your home.

I've placed some rat poison in the attic and sealed up any holes in the walls so we don't get any uninvited guests trying to make their homes here.

uninvited guests by Dan April 21, 2008

The Uninvited

It's the kind of horror movie you expect to be cool and scary, but then you look at the rating (PG-13) and watch it, and its not all that great. The acting is pretty bad, and the scenes were something pops out at you and the music is so choreographed its the equivalent of watching High-School Musical.

I went to watch The Uninvited, now I don't see why people go to movies anymore.

Guy 1: Dude, I watched this weird version of High school musical!

Guy 2: Dude, It wasn't High School musical, it was that movie the uninvited.

The Uninvited by MeNoGrammar February 15, 2009

uninvited guest 

another name used for an unexpected erection gained while in a difficult social situation

one might suffer an uninvited guest during class due to the female classmates attire (or lack thereof) and needs to concentrate on other non sexual feelings in order to calm 'the beast within'

uninvited guest by SoosterFly December 21, 2010