Driver Seat Ninja Share definition Flag When the driver of a car does a karate chop to scare the passenger. Fred was scared by the driver seat ninja, the random and abrupt Karate chop causes Fred to poop a little. Driver Seat Ninja by Lightyear25 August 17, 2011 0 0 Get merch Get the Driver Seat Ninja mug. Buy Now — $32.95 See more merch