Top Definition
To smoke weed inside a closed environment, such as a car with the windows rolled up. Inhaling the second-hand smoke increases the effect.
We sat in the car and greenhoused a couple of joints.
by Savvy Sin December 08, 2007

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To go get stoned/high
"Hey lets go greenhouse" meaning "lets go smoke weed"
by Mac January 15, 2005

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RAF wartime slang for Cockpit cover.
"Couldn't get the greenhouse open"
by Gari July 30, 2005

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the bank
I went to the greenhouse to cash my government check.
by bearsfan23 August 04, 2010

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