How do I defrost a Frozen cooked chicken?

The best way to thaw it out is to thaw it in the refrigerator. You should not just leave it on the counter.

You could also defrost it in the microwave. Using a cold water bath could work only if the package is completely sealed.

A little water on the meat won't hurt anything. The meat won't absorb the water. It will just evaporate during the reheating. I've thawed whole chickens in cold water. Your raw chicken meat should be washed anyway.