noun
hated child; bad kid
Refers to a child who is disliked or considered a troublemaker. Often used in the proverb 憎まれっ子世にはばかる (a hated child thrives in the world).
あの子は近所で憎まれっ子だ。
That kid is the hated child of the neighborhood.
憎まれっ子世にはばかるって言うから、きっと強く
They say a hated child thrives in the world, so he'll surely grow up strong.