get cold feet 临阵退缩；害怕；胆怯；临阵畏缩；临阵脱逃

【例句】
Claire got cold feet, so she escaped her grand wedding.
面对这场盛大的婚礼，克莱尔却选择了临阵退缩，逃婚了。

Are you still planning to go camping with us or did you get cold feet?
你是要跟我们去露营呢，还是你胆怯了？