a kick in the teeth

意思是：突如其来的困难，挫折

讨厌的、且常为未料到的行动

突然的挫折，极大的失， 突如其来的重大的挫折

a kick in the teeth
始料未及的厄运（坏事），挫折，困难
英文定义：if you describe the way someone treats you as a kick in the teeth, you mean that they treat you badly and unfairly, especially at a time when you need their support.

例句：
She was refused promotion which was a real kick in the teeth after all the extra work she'd done.
她被拒绝升迁，这是她所始料未及的，因为她毕竟额外付出了这么多。

牙磕了。。。

一失望