(to get) cold feet(99上~week15)

(1) idiom: to get cold feet
(2) meaning: fear of doing something. 膽小、害怕做某事。事到臨頭打退堂鼓; 臨陣退縮
(3) example:

 Sandy said I should try bungee jumping(高空彈跳), but I had cold feet.