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The act of hot boxing a car with marijuana smoke (multiple blunts is a very easy and preferred method) and then rolling down a window or opening a door next to an unknowing individual to unleash the fury of a potent THC fog. Thus, ganja bombing.

One of the greatest things about ganja bombing is seeing the victims reaction- each one is unique and hilarious.
stoner 1: "Okay, it's getting hard to see and breathe."

stoner 2: "Don't worry, I've spotted a victim."

stoner 1: *rolls down window*

stoner 2: "Oh shit, the smoke is still pouring out!"

stoner 1: "What a beautiful ganja bomb."
by p3ar November 28, 2011
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