kob's Share definition Flag literally, knock-out basoomas; breasts that are so huge you might want to watch it when you are around a girl who has them because they could knock you out. Careful if she turns around too fast, she's got a serious pair of kob's. kob's by Mallorey April 21, 2005 0 0 Get merch Get the kob's mug. Buy Now — $32.95 See more merch