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A person who is very high on marijuana.
Dude, I was so high last night.

You were a grasstronaut!
by wizdog July 14, 2010
38 3
an older guy who wants to go to space camp, to hook it up with the pre-teen lady space cadets. his requirements are any ladies between the ages of 12 to 82...as long as there is grass on the infield, the grasstronaut will "blast off".
That "grasstronaut" totally wants to be space commander to hook up with Britney, on space shuttle pre-teen.
by samandjen June 30, 2006
1 5