Often when one is called Cool, he is somewhat of a groovy person. This was the true meaning of the word when it first appeared in the 60s and 70s. The other meaning of the word was a very popular expression of satisfaction during that same period of time. But nowadays only the groovy part lives on. When cool surfaced in the 19th century, it meant that you were someone in the groove as in a nicely played vinyl record. The saying was popularized by bebop jazz artists in the 1940s. Cool also meant unfazed and under control in a weird situations, like ice which is always cool, always calm looking.
Did you know there is a different origin to cool too. The old African word “Itutu” which means someone who has a mystical aura of coolness .