fill someone's shoes

fill (one's) shoes

To replace one in some role; to take over for one in some position. You do so much for the company that I don't see how anyone could fill your shoes.

See also: fill, shoe

fill someone's shoes

Assume someone's position or duties, especially in a satisfactory way. For example, It'll be hard to find someone to fill her shoes when she retires, or John expects his son to fill his shoes at the store. Also see in someone's shoes.

See also: fill, shoe

fill someone's shoes (or boots)

take over someone's function or duties and fulfil them satisfactorily. informal

See also: fill, shoe