Top Definition
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 08, 2010
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