ratted on

• v. 告发(背叛；撤销)

ratted on的用法和样例：

例句

1. She's ratted on us here comes the head teacher!
   她把我们出卖了--瞧校长都来了！
2. They said they'd help but they've ratted on us.
   他们说要帮助我们，可是他们食言了。