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1 definition by ColonelKetchup

 
1.
The act of rolling up all the windows of your car to contain blaring rock n' roll music. Gets its name from the similar act of hotboxing your car to contain marijuana smoke.
Guy 1: Dude, pop in the Zeppelin CD.
Guy 2: Better rockbox the car to get the maximum effect.
(Both roll up their windows furiously)
by ColonelKetchup June 28, 2008