mule means: A shoe or slipper with a high heel. It has a fitted vamp at the front and no back. You can make the front of your shoe in one of several styles. You can have a different heel height. (in Fashion Dictionary)

What else does mule mean?

A slipper/slipper without a back, or shoe with a close toe. (in Merlin Dictionary)

A sterile cross between a male donkey or a female horse. It is distinguished by long ears, short hair and a thin mane. (in Merlin Dictionary)

Sterile hybrid: A cross between canaries and certain birds, or other plants. (in Merlin Dictionary)

Spinner that creates yarn or thread from fibers. (in Merlin Dictionary)

Small, often electric locomotive or tractor used to haul goods over small distances. (in Merlin Dictionary)

Person who is a courier for illegal drugs. (in Merlin Dictionary)