city kid; urbanite; person born and raised in the city
Often carries a nuance of being unfamiliar with rural life or nature; can be used affectionately or with mild teasing.
He's a true city kid and longs for life in the countryside.
As a city kid, camping is a bit tough for me with all the bugs.
Compound of 都会 (city) + っ子 (child/person from a place). The っ is a euphonic insertion common in such compounds.