JWit Share definition Flag Derogatory. A jehovah's witness. Especially one that you don`t know the name of who is engaged in door to door delusion sales. Cursed JWits keep coming to my house when I`m in the shower! JWit by Fredddddddd December 29, 2012 0 0 Get merch Get the JWit mug. Buy Now — $32.95 See more merch