space invaders (clitoris) 

Space Invaders is the female act of rubbing ones clitoris with the same motion with which she would if playing the arcade game.

I was laying there in sexual bliss whilst playing space invaders (clitoris)

space invaders (clitoris) by Crusty0871 March 30, 2015

Space Invaders 

Individuals or groups of people who sit next to you in cinemas or on public transport when there are plenty of other free seats available.

I was at the cinema alone the other day when about eight space invaders came and sat right next to me.

Space Invaders by Nick VD October 25, 2006

Space Invaders 

A classic arcade game where you pilot a spaceship, at the bottom of the screen, shooting aliens that fly from a formation above you and dodging their own projectiles. I can't believe no one has tried to define this term yet.

(Example is from The Simpsons):

Willy: It's impossible for me to fire a pistol. If you'll check me medical records, you'll see I have a cripplin' arthritis in me index fingerrrs. Look at 'em! holds them up I got it from "Space Invaders" in 1977.

Wiggum: Aw, yeah. That was a pretty addictive video game.

Willy: surprised Video game?

Space Invaders by Dark Laith December 5, 2004

personal space invader

some one who has no sense of personal space and sticks their stupid face really close to yo whilst talking, even though you may not know them very well.

chap 1) met the new guy, dude?
dude 1) yeah, bit of a personal space invader, huh? all leaning in and breathing on me. Freak.

personal space invader by Beat-shaman May 5, 2006

Space Invade 

The most epic, nerdiest way reference to having sex

Mankumar rims Ella
Mankumar is a space invader

Space Invade by Ol' Dirty Gregstard December 11, 2010

personal space invader

A person or pet who invades one's personal space. A person who stands unnecessarily close when they talk to you or just in a place with lots of room. A kid or pet that follows you around very closely so that whenever you change direction you bump into them or step on them.

?I was shopping with my nephew the other day and he was behind me every time I turned around. He was being such a personal space invader."

My dad is such a personal space invader! He stands right up close to you when he's talking to you. It makes a lot of people nervous.

personal space invader by KTDigs July 10, 2014

Space Invader

Someone who's all up in your face while you're chewing the fat.

Your aunt was a space invader.

Space Invader by llamamamall August 27, 2010