cank-ass Share definition Flag Cankles of the ass. Aka Long Butt. Where the ass meshes with the thigh. Girls typically grow this from horseback riding. Like cankles, but more north. "Kelly, look! That girl has cank-ass! She must ride horses." cank-ass by K8eliz December 27, 2011 0 0 Get merch Get the cank-ass mug. Buy Now — $32.95 See more merch