To roll up the windows of a car and start smoking some weed...the smokes gathers in the car and makes the "high" more effective. Another word for hot boxing
She was green housing your new car with some of our weed we just bought.
by crackerbrittney September 03, 2005
Smoking (usually weed) in your car with the windows rolled up.
man, i wasnt smoking but my friends were greenhousing so bad i got high just by sitting in the car with them
by Downshift February 09, 2004

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