Top Definition
An imaginary drug that is used by only the most superfly of people. it will also scare ones girlfriend into thinking it is a real drug.
Me: i been smokin that spleeg
Friend: WHY ARE YOU SMOKIN THAT STUFF, YOU KNOW ITS BAD FOR YOU.
Me: spleeg is a fake drug dude, you just got busted.
by Superfly the magic man December 31, 2011

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