A fork of Rural Dictionary
The rare and abnormal act undertaken when a person who you have never previously had any aquaintance with, sits next to you in a situaiton when all of the other places to sit down are empty, like in a movie theatre or a bus.
Tom: "Hey man how was your movie?" Craig: Man, it was shit i had to deal with a personal space invader the whole time!
The act of lodging a rusty crowbar into the anal cavity of another individual.
Zack totally got a gaping space invader yesterday.
Someone who is all up in your myspace page, leaving too many comments, messaging you, and commenting on your pics as if they know you.
Bob: What is the deal with Jake leaving comments on your page? Jenn: I don't know, he's just a space invader!
A guy who has a preference for fucking people best described as "space cadets" ie incredibly stupid.
"That Barry, he is such a space invader. He prefers stupid partners." "Probably because most folks are too smart to let him fuck them."