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1.
A warning issued to friends or co-workers that a public facility has been polluted by human waste or flatulence, either yours or another person's.
Bart issued a Brown Alert in the first floor men's room this afternoon because he had Mexican Food for lunch.
by Philo Beddoe November 13, 2008
35 9
 
2.
When the urgency to defecate is so intense you're only mere moments from soiling yourself.
"I had to clench my ass cheeks together and hop to the bathroom because I was having a serious brown alert."
by Suck It Wilde September 02, 2009
16 1
 
3.
when someone has to take a major shit
oh god, look out brown alert comin through.
by danny and mason February 16, 2004
13 6