get cold feet
US /ɡɛt koʊld fiːt/
UK /ɡɛt koʊld fiːt/

1.
겁을 먹다, 주저하다
to suddenly become too frightened to do something you had planned to do
:
•
He was going to ask her to marry him, but he got cold feet at the last minute.
그는 그녀에게 청혼할 예정이었지만, 마지막 순간에 겁을 먹었다.
•
I was going to try bungee jumping, but I got cold feet when I saw the height.
번지점프를 하려고 했는데, 높이를 보고 겁을 먹었다.