cold feet除了指“冰冷的脚”外，还可以指“害怕，胆怯；信心或勇气的丧失”。

【例句】
He was going to ask her but he got cold feet and said nothing.
他本来是想向她提出邀请的，可事到临头他却胆怯得什么也没有说。

He signed the contract and suddenly got cold feet the following day.
他签了合同但第二天突然胆怯起来。