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A green out is a cannabis induced physiological or psychological panic attack. Symptoms include sweating, nausea, heart palpitations, hypervigilance, paranoia, and the fear or feeling that you might be dying or about to die. A green out is typically caused by smoking or ingesting too much cannabis too quickly.

Green outs are generally brief experiences and may be followed by exhaustion or drowsiness, or a rapid sobering.

Unlike black outs, memory loss doesn't tend to occur during a green out due to the intensity of a green out.

Memory loss is much more likely to occur during a long, sustained session of cannabis use.

Unlike alcohol, cannabis use affects short term memory (what was I saying?) and not long term memory (what did I do last night?).

Sativa strains may be more likely to cause green outs (while indicas are more likely to leave you stoned)
Person 1: Dude, don't smoke so much. you'll green out.
Person 2: pshh, green out, sure, whatever.
(green outs vary depending on the circumstances so it's difficult to describe a specific example, and it can take multiple green outs to really understand what's happening when you have one).
Person 2, now an experienced pothead: Dude, don't smoke so much. you'll green out.
Person 3: pshh, green out, sure, whatever.
by thatonespecificguy May 23, 2018
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2
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
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3
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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4
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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5
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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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
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7
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
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