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1.
BNO
Boy's Night Out. A night out with the guys. No chicks allowd.
Guy 1: BNO?
Guy 2: Fuck yeh boi!! Da hell wit dem bitches
by ShutYour5Hole December 16, 2009
 
2.
BNO
BNO means: big night out!Big night out
Are you ready for our BNO Saturday?
by Paulo NYC August 15, 2007
 
3.
BNO
Brand New Outfit
Omg, I totes need a BNO for this date.
by JKS84 March 31, 2010
 
4.
bno
To act, be or imitate a clown.
Example: You are such a beano!
by Contributor August 20, 2003