Similar to canckles but when not only the calves are connected seamlessly to the ankles, but the thighs as well, resulting in a freakishly straight leg from the thigh to the floor
An exaggeration of 'cankle'. Whereas 'cankle' is a contraction of 'calf-ankle', 'thankle' is 'thigh-ankle'. Indicates that there isn't just no discernable ankle, but no knee either.
Speaker 1. Sally has such cankles.
Speaker 2. No, they're not just cankles, they're THANKLES!