When you get a green liquid mess such as kiwi juice, pea soup, wheat grass shot, etc. on the front of your nice, clean, starched shirt.
Bob: "What the fuck is on the front of your shirt?!"
Sue: "It's alien jizz... after being anally probed, the Martian men decided to use my shirt as a cum rag, tastes delicious!"
by Carly Wild June 19, 2008
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A cop out, bullshit ending or rehash.

As made famous by Steven Spielberg and George Lucas in Indiana Jones and the Kingdom of the Crystal Skull. Probably used in a time of panic and under the influence of both alcohol and a myriad of illegal substances.
George: "Are we sure we want to make a new Indie movie, I mean the guys not as fit as he used to be and those are classic films?"

Steven: "How else are we gonna fund our habit?"

George: "I'm just struggling with an ending, that's all"

Steven: "Aliens did it."

George: " You haven't read the script..."
by jMiR89 February 1, 2011
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Some kind of sexual intercourse with someone who isn't from where you live.
Guy 1- Hey man, heard you got yourself some action while on your vacation!

Guy 2- Yeah, I got me some Alien Poon!

Guy 1- Wow, that was the dumbest thing I've ever heard.
by Superfly58 November 20, 2008
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A lighthearted and subtly derisive expression used to point out a sudden and profound shift in a person’s behavior, when someone does something entirely out of character.
Suddenly, after a lifetime of being late to everything, I found myself arriving solidly fifteen minutes early to all of my appointments, so I began to imagine I may be just one of the many folks who are channeling aliens!
by Dr Bunnygirl June 12, 2021
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a name for an emoji created by the youtuber "24 frames of nick"
"you dude,that looks like an alien ween"
by alethia 6785 October 10, 2020
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the best alien in the univers who hangs around with America
in hetalia tony the alien watches a scary movie with America and Japan
by Cornwall & Scotland June 21, 2014
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(n) When the male scrotum is viewed upside down, resembling a brain of an extraterrestrial, or alien.
by Matthew Pablo September 3, 2006
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