OSBW Share definition Flag A Call of Duty clan meaning Old School Beat Warriors. If you see this clan in-game you are going to get shit on by these guys. Not very popular but very skilled. I got owned on Call of Duty when I ran into an OSBW member OSBW by caidanb8 January 30, 2018 0 0 Get merch Get the OSBW mug. Buy Now — $32.95 See more merch
