a kick in the teeth
US /ə kɪk ɪn ðə tiːθ/
UK /ə kɪk ɪn ðə tiːθ/

1.
当头一棒, 沉重打击, 背叛
an act of betrayal or a severe disappointment
:
•
Losing the promotion after all that hard work was a kick in the teeth.
辛辛苦苦工作后失去晋升机会,真是当头一棒。
•
His sudden resignation was a kick in the teeth for the whole team.
他突然辞职对整个团队来说是一个沉重打击。