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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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

The Urban Dictionary Mug

Lotsa space for your liquids.

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Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt