Do you know ghouls from goblins and ghosts?
1808, from Arabic kaif "well-being, good-humor." Specifically, state of dreaming intoxication produced by smoking cannabis; dolce far niente. In Morocco and Algeria, it was the name for Indian hemp.
(also keef or kief or kif) Marijuana, hashish, or opium
[1878+ Narcotics; fr Arabic, ''pleasure'']