tell on somebodyTELL SB ABOUT BAD BEHAVIOUR 告发不良行为 phrasal verbphr v informal to tell someone in authority about something wrong that someone you know has done – used especially by children 告发，打…的小报告，告…的状〔尤为儿语〕 Please don’t tell on me – my parents will kill me if they find out! 求你不要去告状——我父母如果知道会宰了我的！
→ tell on somebody at tell(PHRASAL VERB)