“Chill out” was used way back and then it fell out of use. Then it made a come back. “Doobie” is an ancient term of the same age as “Maryjane” which were common when “chill out” first came into the language. They were in common usage in the mid-60s.
I assumed you were making a reference to the very old days but you probably don’t remember Cheech and Chong as a comedy team.
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