tattletale
🇺🇸
/ˈtætlteɪl/
🇬🇧
/ˈtætlteɪl/
A person, especially a child, who tells on others, revealing their secrets or misdeeds.
When I was younger, my little sister was always the tattletale, telling mom every time I did something I shouldn't.
어렸을 때, 내 여동생은 항상 고자질쟁이여서 내가 하면 안 되는 일을 할 때마다 엄마에게 이야기하곤 했다.