Top Definition
someone in 3rd grade who steals all of the red crayons and markers. A blue jacker is someone in 6th grade who steals your blue.
Hailey: I like red, I'm gonna pick up the crayon and color with it

Dominic: Dude that red is mine (takes red)
Hailey: Dud you are such a red jacker
by wormy4evanobutterflies December 06, 2010

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