This informal and often insulting meaning refers to a child considered rude, demanding, or poorly behaved.
The character behaves like a spoiled brat.
Do not call the child a brat.
This mainly North American informal use is a shortened form of bratwurst.
He grilled several brats for lunch.
The food stall serves spicy brats.
Used in compounds such as army brat or military brat, this meaning refers to a child raised in a family connected to a mobile institution or profession.
She describes herself as an army brat.
Military brats often move between countries.