Cool runnings is literally defined in the film to mean: peace be the journey
1. The title of a well-known 1993 comedy, starring the late John Candy (dir. Jon Turteltaub). The film concerns the first Jamaican bob-sled team. It is loosely based on the true story of the Jamaica national bobsled team's debut in the bobsleigh competition of the 1988 Winter Olympics in Calgary, Alberta.
2. Jamaican patois. The phrase 'cool runnings' literally means, 'go in peace' or, 'safe journey'. A useful salutation at the end of a text message, 'cool runnings' may be considered as a synonym of 'stay black'. Several bona fide sources credit first usage as a salutation in text messages, to the urban legend Leeds Dr Rudeboy.
Leeds Dr Rudeboy: What whoa! Me gwan drink some rum! Cool runnings, my brother of color!