"get cold feet" means to be nervous about doing something you have already decided to do. used before big events like marriage or performances Examples: He's getting cold feet before his wedding. I got cold feet, but went ahead anyway. I'm glad I did. http://esl.about.com/od/g/g/ig_g_cfeet.htm :)

He wanted to ask her out, but he was so shy that he got cold feet at the last moment.

Hello Linky, 'to get cold feet' is to suddenly become too frightened to do something you had planned to do. "I'm worried he may be getting cold feet about our coming trip."

It means to be became afraid or have second thoughts about a decision you have made.

means "to be afraid"