Top Definition
When a person smokes way too much marijuana and as a result, feel extremely nauseated, flushed and or chilled, and may even throw up.
Basically, it feels alot like the flu just walked up and punched you in the gut, the best thing to do is lie down, and even sleep if possible.
Me on the bus ride home last Friday. You do NOT want to be greenin out when you're in a vehicle.
by Shannon, courtesy pf Johnson December 10, 2006
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