a state of drowsy contentment, especially from the use of marijuana, opium, or other narcotic: In our peace-themed rooms scented with patchouli and the smoke of homegrown weed, we felt the kef and thought we were saving the world.

Also kief [keef], /kif/, keef [kee- ef ] /kiˈɛf/ . a substance, especially that which is derived from the THC-rich budding heads of the cannabis plant, used to produce this state: Along the river, old men sat on benches smoking their pipes of kef.