Top Definition
The air that is expelled from an anus before, during or after excretion. Or entirley on its own. The 'dirty air' is usually warm to hot in temperature(about 60-70degreesC), and can be seen on cold days as a vapour cloud that is brownish in colour. Speeds recorded of dirty air have exceeded over 600 mph, over the speed of sound!
That was some foul dirty air i just smelt, johnnys ass stinks!
by Alex Sabga March 03, 2005

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.