After many years of being a Grass Head, one will shun their friends and family to marry their lawn. A form of insanity that few ever possess. It is a cureable disease that controls your mind and heart.
Mr. Smite is now married to his lawn. Some say he's just a wack job. But we all know he has Grass Brain. Poor guy...
by Spirit Girl September 8, 2010
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1. A term used to describe Marijuana for a student or employee who is productive at school or work. 2. Breeds creativity through the consumption of Marijuana.
I smoked some brain grass before writing my paper.

I need brain grass to do my best work.
by Stoner_student January 21, 2023
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