spoilt child; pampered child
Refers to a child who is overly dependent on parents or adults, often seeking attention and affection. Can be used affectionately or critically.
That child is a spoilt child, always clinging to their mother.
My younger brother is a pampered child, so he can't do anything by himself.
Compound of 甘え (the continuative form of 甘える 'to behave like a spoilt child') + っ子 (a suffix meaning 'child').