B.O.S. 

Black Out Status

Kate: "B.O.S. tonight?"
Kayla: "It's a Thursday, is that even a question?!"

B.O.S. by Danielle Crazy Bitch September 18, 2010

B.O.S. 

Blast On Site- used in gang grafitti to threaten rival gangs.

Brothers Of the Struggle - meaning any gang member involved in the gang struggle

B.O.S. Lil' Mac, Blast him On Site

B.O.S. by Oscar III March 6, 2008

B.O.S. 

stands for Beating on sighting

timmy been slipping up give him a B.O.S.

B.O.S. by kingkong420 January 7, 2008

B.O.S. 

stands for Balls of steel , is used when someone does something that takes a lot of balls. so you you give them their props. is a compliment given to a true badass

dude 1-- " oh man i cant belive she just did that shes crazy!"

dude 2-- "i know man shes got some B.O.S.!"

B.O.S. by yellowseven365dude September 14, 2012

b.o.s. 

brushes off shoulder or brushing off my shoulder; used when you want a cocky way of saying thank you

jordan: dawg, you are so good at being cool
kim: b.o.s.

b.o.s. by Kimburrlee May 11, 2008

B.O.S. 

means bad ass but you say it as bos. not b dot o dot s dot.

(also means Beware of Stingray. sorry steve irwin)

that was so B.O.S. fuck i love you

B.O.S. by yoyoyoyoyooy May 21, 2008

B.O.S. 

An acronym meaning Boner On Sight

When my girlfriend walked out in her new bikini I got a B.O.S.

B.O.S. by Vada Vada July 23, 2020