They have ratted on us.

他们背叛了我们。

youdao

We haven't ratted on our friends.

我们没有出卖朋友。

youdao

My brother ratted on me to my mother.

我弟弟向我妈打我的小报告。

youdao

An employee ratted on Odebrecht Contractors for underbidding on a federal contract, arguing it intended to raise prices later (his suit was dismissed as "fatally flawed").

FORBES: The Dark Side of Whistleblowing

Eventually, somebody ratted them out, and the police captured them on the day before Thanksgiving, at the house of a friend in Cambridge.

NEWYORKER: Hellhole