K O S 

Kill(ed) on sight. Used for a person/group of persons who are banned from an area. If this ban is broken, they will be killed on sight.

U're on KOS. If u ever come here again u will be killed on sight.

K O S by Mau August 2, 2005

K O S 

A gang in LA called "Kappin Off Suckas".

yo K.O.S is hittin the streets

K O S by hollaAtdis August 11, 2006

K O S 

a fake ghetto made by the town of westerly. it contains fake ghetto from the unghetto town of westerly

geeze, that KOS is at it again, goin down that street with the baby blue.

K O S by jessie t August 12, 2006

K.O.S. 

Kill On Sight. From games such as World of Warcraft, etc. Means basically marked for death just by showing your face.

Damn, they KOS'd me!
Look out, I think we're KOS!

K.O.S. by offkilter March 23, 2005

k.o.s. 

gaming term meaning Kill On Sight. Basically a wanted add if directed at a single player. Or it can be used to describe another team you would rather kill instead of another.

Dude, he's K.O.S.
ignore green blues are k.o.s

k.o.s. by The_Irish_Jebus (formely known as NukesAgeek) February 22, 2008

K.O.S 

Keep On Striven - One Step at a time never give up. Change the world K.O.S

I Keep it K.O.S Keep On Striven i will never stop pursuing my dreams

K.O.S by Mister K.O.S December 19, 2016

k.o.s. 

Knowledge of self. off of the mos def and talib kweli are black star album.

life without knowledge is death in disguise

k.o.s. by The Thief in the Night April 9, 2005