Brat

noun

1. A child who is regarded as mischievous, unruly, spoiled, or selfish.

   "Get that little brat away from me!"

2. A son or daughter (at any age) of an active military service member.

   "an army brat"

3. A turbot or flatfish
4. A rough cloak or ragged garment
5. A coarse kind of apron for keeping the clothes clean; a bib.