Combination of 'beer' + 'roof'. The act of sitting on a roof and drinking beer.

Originated in Cal Poly- San Luis Obispo.
We were brewfing it until we finished a 30 pack and someone fell off the roof.
by Rik Malibu April 23, 2009
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to drink beer, or any type of alcohol, on one's roof. A basic combination of the root word brew, which is synonymous with beer, and roof. An incorrect spelling would be broofing.
Come over, we're going to be brewfing at the day party.
by jswingnuts April 23, 2009
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Verb. To drink alcohol and party on a rooftop.
At Cal Poly San Luis Obipso, so many people were brewfing together that the roof fell in.
by SLO Doc March 22, 2015
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A case of beer one carries around all night as if it were a brief case.
Dude, that guy has been carrying that brewf case around all night.
by DalekCaan September 30, 2014
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