Cold Feet?

Hi... I searched hi and lo... it's listed here as an expression.. but I cannot find the meaning! To Have Cold Feet... anyone know? Thanks and happy New Year to all!

American Heritage Dictionary says: "cold feet. Slang. Failure of nerve."

Someone who "has [or "gets"] cold feet" has sudden misgivings about a contemplated course of action and is likely to back out. I imagine the phrase comes from the effect of fear on one's circulatory system.

You're welcome.