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

Ankles on a obese person. The ankles are so big there is nothing between the calf and the foot, so its called a cankle.

when a persons ankle is the same width as their calf muscles... that is called a cankle

Where the calf and ankle merge to become one large stalk and takes on a tree-trunkish appearance

Lack of narrowing of the lower calf where it meets the foot.

When a woman`s calve muscles blend in with her ankles.

When the calf of a woman/man seems to fuse to the foot, not leaving any slimness between these two points. Mostly tubbos (really morbidly obese people) have these goin on.