Twiff Share definition Flag The knot section of a man's tie, used to cover the claff (see claff) can be judged on size, shape and all round build quality. "Ben's twiff is looking awful as usual, should have gone for the double Windsor" Twiff by Shah shakedown May 6, 2015 0 0 Get merch Get the Twiff mug. Buy Now — $32.95 See more merch