Itutu is a Yoruba word (in 15th Century Nigeria) for a religious feeling that translates into English as "cool." It has been suggested that Itutu is the origin of the American concept of "cool."
Check out what else wiki has on Cool (Aesthetic).....it's really interesting.
And here's a quote i thought was SO true...
"The mainstream perception of 'cool' is narrow and distorted, perceived merely as style or arrogance rather than a way to achieve respect."