Involves constant throwing up and feeling extreme nausea and dizzyness for the rest of the night, possibly with continued vomiting later on. In more extreme cases, the person in question may experience hallucinations.

Occurs when someone smokes a lot of marijuana in a short period of time. Common amongst those who want to prove their masculinity somehow by smoking large amounts, usually through peer pressure.

Usually ruins the night for everyone else, as it means they must look after them and take them home. So people who green out often aren't very popular with the rest of the dope heads.
Person 1 : "Wheres he going? Oh no, he's greening out."
Person 2 : "For fucks sake, not again."
by OiOiBoy July 1, 2006
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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
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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
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Basically;

You’re so high on weed (hence, “green” out), that you are totally useless. Common effects of greening out would be horrible munchies, motor functions are almost gone, you can’t speak coherently, memory loss from the night of, nausea, vomiting, etc.

In other terms, it’s like getting blacked out drunk, but instead of alcohol, it’s weed.
Jason: Dude, last night I got so zooted I couldn’t even walk.

Cam: Aw bro, did you green out?

Jason: maybe, can’t remember much man.
by Cxvmusic August 7, 2019
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To vomit after inhaling substances- Usually marijuana
1: *cough cough*
2: Dude- dont green out
1: *Vomits*
by Dave October 22, 2004
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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 30, 2011
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It makes you feel like everything is so smooth and in like slow motion and like you can feel your heart beat in like weird spots and you kinda start shaking because your head makes you think other things and you go into panic mode the best way to try and feel better is going to sleep but be careful because if you throw up you don not want to drowned in your own puke just drink most fluids mostly water and Gatorade. Take this very seriously you can make your self hear things and see things and you think it’s real just you gotta be watched by someone and after throwing up you feel normal again this is the second time happing to me I smoked last night when all this happened and I still woke up high my eyes were still blood shot and I still felt the same but I have just slept the whole day just be very careful this is caused by smoking to much weed
All the time smoker: here try this
New smoker: I like this ima keep hiting it
All the time smoker: feel weird ?
New smoker: yeah everything is moving I’m gonna puke n I hear things

All the time smoker: that’s normal you just smoked to much it’s called greening out
by Hailey Lewandowski January 21, 2020
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