Killin' Spur Share definition Flag Five kills in a row without dying, first said by gamers on the Halo 2 online community during a ranked SWAT match. As said by an overly-hyper Halo 2 gamer: "Oh, shit! KILLIN' SPUR!!" Killin' Spur by Spartan VI June 29, 2010 0 0 Get merch Get the Killin' Spur mug. Buy Now — $32.95 See more merch