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rambunctious kid; wild kid
hooligan; rowdy; roughneck; a rough
暴れん坊の子供が走り回っている。
A rambunctious kid is running around.
暴れん坊で手がかかる。
He's a wild kid and requires a lot of attention.
暴れん坊だった頃を思い出す。
I remember when I was a rambunctious kid.