Top Definition
Gas that a well off person passes. The word fart is too offensive for them.
Sir Charles passed some brown air that Sir Winfred walked in on.
by ugfest January 15, 2007
Brown air is the kind of rectal expulsion that often causes symptoms similar to those experienced by mustard gas victims. An acrid, thick, almost tangible odour.
"Goodness me, Ponsonby just snuck out as I walked in only to be assailed by a cloud of the foulest brown air!"
"Yes, he's a bastard is Ponsonby. Notorious for his obnoxious air biscuits"
by The Mongo Collective January 09, 2008
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