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1.
A ganja greyhound is like a greyhound (vodka and grapefruit juice)but instead of using vodka, you dump the grapfruit juice into your bong and rip it to your hearts content.
Jon: "Hey man I'm mixing drinks, you wanna greyhound?"
Ed: "Nah man, I'm mixing drugs, lets have a ganja greyhound."
by Officer O'Reily March 22, 2005