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!
Craig: Man, it was shit i had to deal with a personal space invader the whole time!
by Red Cheeks Paul May 21, 2009
by Major ED February 13, 2010
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!
Jenn: I don't know, he's just a space invader!
by JenninIndy September 17, 2007
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."
"Probably because most folks are too smart to let him fuck them."
by RTM 1963 November 27, 2022