The band’s name comes from the following controversial etymology of the expression “O.K.”:

During historic wars such as WWII as troops returned from a mission without any casualties, a writing was displayed for all to see which read: “0 Killed”. It is considered we have adopted the abbreviation “O.K.” from this time in history.  This derivative aligns especially with Zero Kills’ support of our military and the need for all of us to be aware of the world around us.

There are other theories that date the expression further back in history. These include “Old Kinderhook” a nickname of US president Martin Van Buren,  a Scots expression och aye, the Greek ola kala (‘it is good’), or the Choctaw Indian oke or okeh (‘it is so’).