Top Definition
a jack o'd is a type of person, a person who sucks at halo 3. he will own the game and complete the game on easy, but when a friend called will comes round, who doesnt own the game, he will completely destroy him on multiplayer.
A Will: Hey you wonna play halo?
A Jack O'D: nah, u beat me everytime even tho you dont own the game. i suck!
by Willzyx July 07, 2009
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