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A large, not-very-nice female black dragon in the MMORPG World of Warcraft. She is Nefarian's sister and daughter of Neltharion a.k.a. Deathwing (who first appeared in Warcraft II). One of the toughest raid bosses in the game to defeat.
PLAYER #1: "Let's get a group together to kill Onyxia."

PLAYER #2: "Fuck no, I'm scared of her!" (soils self)
by Rabid_Caterpillar July 12, 2006
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Sep 8 Word of the Day
A casual invitation / threat used by an individual that is not afraid of fucking someone up.
PAUL: I'm going to beat your ass.

JACK: Fuck around and find out, fool!
by NX STARCHILD October 16, 2020
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