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2.
green out is when you have smoked to much weed that it makes you passout.
oh my god, i think that coco and nick are going to green out.
by missy smelliot October 18, 2006
 
1.
smoked too much weed and your just fuuuucked, might puke even or just fall asleep
Example of a terrible green out:

I was with my 2 friends, we got baked as shit for like and hour and then went to the buffet, i fucken pigged out then we went to mcdonalds to get something to drink (dollar drink days!), I drank a litre of cola and then i felt really sick, started getting codl sweats and then i puked in my cup, then my friends cup, then my other friends cup and filled em all up except the last one....people were looking at me like WTF!!! i think they were anyway, i threw the puke out and we bailed

then I felt sober as fuck and realllly good, like puking after drinking...but i wanted to get high again before the movie, so we hot boxed the car and I was fucked up again and then we saw get him to the greek, i dont remember anything about the movie
by cuppy cupperson July 07, 2010
 
3.
To vomit after inhaling substances- Usually marijuana
1: *cough cough*
2: Dude- dont green out
1: *Vomits*
by Dave October 22, 2004
 
4.
To smoke so much marijuana you're completely incapable of being interesting.
You green out and go and sleep behind a curtain for the rest of the night.
'oh man i fully greened out last night and woke up in the kitchen cupboard'
by SelfRighteousSuicide December 18, 2004
 
5.
Green Out: When a pot smoker has smoked a lot of weed in a short amount of time, or taken large hits of very good bud and passes out. Vision gets blurry, loss of hearing, and your balance gets so out of whack you don't know which way is up. This can happen with both newbies & long time smokers.
After three hits in a row off of the gravity bong, Clint fell over and had a green out. He woke up, drank some water & was fine.
by TheSmokeyInformer December 29, 2011
 
6.
When someone smokes so much marijuana that they black out and lose consciousness
Dam, Jordan took some mad weed hits outta the bong! i think he might greenout
by SwagJuice July 19, 2010
 
7.
To smoke too much marijuana over a long period of time, or too much in a short, quick period, and vomiting; To become completely, and utterly fucked. Everything goes spinny, you feel dizzy and tingly, and eventually yak, and pass out.
Johnny: Bro, danny just yaked, do you think he's gunna Green-Out?
Danny: Yo, slow down, i need to lie down man..
Rick: No man, you gotta stay awake.
*Danny passes out*
by Thunderpuffs August 26, 2008