What is "cool" anyway? An attitude? The way a person carries themselves? Whatever it is, apparently we American's have it. According to a new report from Reuters American's as typified by the likes of Jack Nicholson and Johnny Depp are still considered to be the "coolest" nationality. A survey conducted by the social networking site Badoo.com found that American's were thought of as the "coolest" while Belgians were the least "cool". Who else is cool?