wet blanket -用法

wet blanket

a person or thing that keeps others from enjoying life扫兴的人或物

Don't be such a wet blanket．Come on，join the fun．不要这样令人扫兴，过来和我们一起玩。

The sudden downpour threw a wet blanket on their plans for an excursion．突然下了场倾盆大雨，把他们郊游的计划给毁了。