Someone or something that causes a commotion or nuisance; a person or action that stirs up trouble or false alarms.
彼は人騒がせな性格で小さなことでみんなを心配させる。
He has a knack for causing a fuss and makes everyone worry over small matters.
夜中の誤報は本当に人騒がせだった。
The false alarm in the middle of the night really caused a lot of trouble.
あの人の噂話はいつも人騒がせで、真実かどうか分からない。
That person's gossip always stirs people up, and it's hard to tell if it's true.