rat on

phrasal verb
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rat on somebody
(North American English also rat somebody out (to somebody))
  1. (informal, disapproving) to tell somebody in authority about something wrong that somebody else has done泄露秘密;告密
    • Where I come from, you don't rat on your friends.在我的老家,谁都不出卖朋友。🔊🔊
rat on something
  1. (British English, informal) to not do something that you have agreed or promised to do背弃做某事的诺言 synonym renege
    • The government is accused of ratting on its promises to the unemployed.政府被指责对失业者背信弃义。🔊🔊