rat somebody ↔ out American English informal ( see also ↑ rat )
if someone rats you out, they are disloyal to you, especially by telling someone in authority about something wrong that you have done:
You can’t rat out your teammates.
rat somebody ↔ out American English informal ( see also ↑ rat )
if someone rats you out, they are disloyal to you, especially by telling someone in authority about something wrong that you have done:
You can’t rat out your teammates.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012