Top definition
1. usually associated with marijuana, when you mix either 2 different types of marijuana together or you mix marijuana with some other drug.
joe: yo man ready to smoke some dank bud.

jon: yeah dude, my friend gave me this bud and it was laced with acid.

joe: OH SHIT BRO...CROSSING THE BEAMS
by dsdsdsssdsdd May 15, 2011
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