Question

a kick in the teeth

Accepted Answer

[informal] [puñalada por la espalda, tratar a alguien de manera injusta] 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 (She was dismissed from her job, which was a real kick in the teeth after all the work she'd done.)

Front	a kick in the teeth
Back	[informal] [puñalada por la espalda, tratar a alguien de manera injusta] 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 (She was dismissed from her job, which was a real kick in the teeth after all the work she'd done.)

Kick Teeth Informal Puñalada Por La Espalda Tratar