Top Definition
Grassing out vocalizes the act of someone passing out or being overwhelmed and choking before, after or during present smoke caused by fumes induced by incinerated Cannabis leaves.
dude 1: first bong ever WHOOOOO I'm gonna get soo high
dude 2: go on man take a hit
1 minute later while dude one is Grassing Out
dude 2: WHoa bro he tots grassed out
The Dude: Far out man, far out.
by Niels Hammers Ruler of Worlds September 27, 2013
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