This word is the
natural predecessor of 'Chillax'. First
coined in Brighton in the late 1990's, 'Chool' is an amalgam of 'Chill out' and 'Cool it'. Where as 'Chillax' is often used to positivley describe ones own activity, or intended activity, 'Chool' has a
tone of pejorative instruction.
You're being a
bit weird mate, why dont you chool?
If Hannah dosen't chool a bit, her
head will explode.