Cankle

Contrary to popular belief, you don't really have to be fat to have cankles (though they are cute on chubbish girls), you just have to have boringly straight legs with no middleman, that is, no tapering between the calf and the heel. Looks less severe on skinny folk.
Alternate spelling: Kankle

Fat hasn't caused my cankle problem, I just have straight and boring legs.