1: an AWESOME game serial by nintendo featuring the bounty hunter Samus Aran, the first female videogame hero.

2: A creature in the afore mentioned game. THese creatures express predetory and parasitic tendancies in that they latch on to their victims with their large mandibles and syphon the life-force out of them, leaving the victim dead and the metroid larger. They are green with a gelatinous but tough exterior shell containing 4 nucliei. They where created by the Chozo to keep the X-parasites on planet SR388 in check. In metroid they can only be killed by freezing them then shooting 5 missiles at them.
1: Metroid is a freaking awesome game!!!

2: RUN! METROIDS!!!!
by Jim October 2, 2005
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a female who sucks the life from a male, specifically while dating; succubus
1:"Where's Bob?"
2:"With his girlfriend"
1:"Does he ever hang out with the guys anymore?"
2:"No dude, she's a metroid"
by DJ Callit October 7, 2005
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a noob who thinks he / she is cool.

in reality, he / she is a nerd.
<person a> : i am soo uber cool. cool like ice!
<person b> : you're such a metroid.
by silver_ October 3, 2006
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In the ancient Chozo language Metroid means 'Great Warrior'. The Metroid species were named so because of their ability to fight the parasite X. Technically, since Samus Aran is capable of defeating the Metroid species and Parasite X, she is a 'metroid'.
Jeezus, I'm gonna get laughed at and lynched for actually knowing what Metroid means. I am SUCH a nerd.
by JoetheArachnid February 17, 2009
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Parasitic lifeform that leeches onto it's host and drains the life of said host. Found on the planet SR-388.
The metroid attached to my sac and now I'm sterile.
by Hackfest May 23, 2005
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To have all of the abilities, equipment, powerups, etc, removed from a character in a videogame. Often happens at the start, or just before the start, of the game. Occasionally happens in the mid-to-late stages, but usually doesn't last for long. The term comes from the game, Metroid, where a player is usually stripped of all powers just before the game starts, forcing a long and difficult (though actually enjoyable) journey though the planet/space-station to recollect the various abilities you had at the beginning, so that you might destroy the final boss.
A: "I don't like the Metroid games for one reason."
B: "Oh?"
A: "You get Metroided."
B: "Oh."
by Fenixius August 29, 2007
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Adj; A situation that presents a person with many difficulties usually involving a hard to find object, solution, or path.
Party 1: Wow. That was hard.

Party 2: Yea. That was pretty metroid.
by Trav Mob November 18, 2009
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