knock-kneed

Having the knees abnormally close together, and the ankles spread apart.

I called for the cheeses, and took them away in a cab. It was a ramshackle affair, dragged along by a knock-kneed, broken-winded somnambulist, which his owner, in a moment of enthusiasm, during conversation, referred to as a horse.

Of a person or animal, suffering from genu valgum (or tibia valga).