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1.
Sheepgirl is an insult used in Facebook /RolePlay/ communities, especially within the Mustache clan. The term originates from trolling culture, when a member of the Mustache clan was confronted by an outsider. When she proceeded to troll this outsider, he called her a sheepgirl. Since then, the term "sheepgirl" has been defined by the original group member as "a huge insult in some foreign country."

Sheepgirl is most likely Nigerian slang for a slut or whore, but its definitions and origins are still not totally defined.
Diana: SHEEPGIRL, TROLOLOLO!
Weedgirl: Draco is a sheepgirl! Hahahaha! Sheepgirl!
Draco: T.T
Diana: D'aww, I bet it's a huge insult somewhere else.
Weedgirl: ROFL, THE GAME. UMAD?
Draco: Sheepgirl? Waa!
by DianaTheGame May 31, 2011