What is the meaning of Nappy?

An absorbent garment worn by a baby or toddler who does not yet have voluntary control of their bladder and bowels or by someone who is incontinent; a diaper.

To put a nappy on.

Having a nap (of cloth etc.); downy; shaggy.

Of hair: tightly curled or twisted; frizzy

Inclined to sleep; sleepy.

A shallow, flat-bottomed earthenware or glass bowl with sloping sides.

Foamy; having a large head.

Nervous, excitable.

A kind of strong ale; nappy ale.

Brittle.

Source: wiktionary.org