Short for "Greenside Operations", is a term used to describe special operations carried out by the US Marine Corps in which direct contact with opposing forces is not intended. These type of missions are usually carried out by Force Reconnaissance, an elite special-purpose unit of the USMC.

Get some light armor and don't take too much ammo; the mission's greenside.

greenside by James029302 December 16, 2007

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Greenis

A green penis (typical symptom of gonorrhea).

1)
Girl 1: I almost let this dude bang me but than I saw he has a greenis!
Girl 2: Hello? That's like totally disgusting!

2)
Doctor: Okay, now please remove your pants so I can OH MY FUCKING GOD YOU HAVE A DAMN GREENIS!!!
Patient: What??? What does that mean???
Doctor: It means that you like hookers!
Patient: Wha... ???
Doctor: It means you can't beat the axis!
Patient: What the hell are you trying to tell me, doctor???
Doctor: You, sir, have gonorrhea!

Greenis by F4LL0UT July 25, 2010

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Greenshirt

A legend of lacrosse in the State of Oregon. He is known as Greenshirt because of the green shirt he wears on a daily basis under his pads. He is all that is man. Everyone should bow down and pray to him whenever they step onto the field. Greenshirt can and will slay/sacrifice whomever he desires.

Greenshirt sacrificed his stick to a player from Clackamas.

Greenshirt by Greenshirt4life April 3, 2008

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greenskins

Orcs and Goblins, and related creatures (including Space Orks, Gretchin, Hobgoblins, etc.). It's apparently exclusive to the Games Workshop range of games.

If Orcs really existed, this term would probably be considered racist (especially since some Orcs, the Black Orcs, do not have green skins in Warhammer).

The fortress was besieged by a ravening horde of Greenskins.

greenskins by Andy May 1, 2004

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