What is Green Sheep?
1.
A former gamer's username. This gamer briefly went through a lot of FPS's. And when I mean briefly, I mean in about a week. Such as Jedi Knight : Jedi Academy, Quake 3, Counter Strike 1.6, Unreal Tournament 2004, etc... He "owned" as some gamers said at each game. Now the word has been sometimes used in replacement of the words "pwn" , "uber" and "ownage" in video games.
Because of the previous definition I mentioned. People have started using this word more often. So people now are using this new definition for it. "A sheep that vomits". That simple. But people don't really "enjoy" this type of sheep, so it has been known as the least favorite kind.
"That guy just green sheeped you in Quake 3"
"I hate green sheep. Their messes are so disgusting"
See