reefer UK /ˈɹiːfə/US /ˈɹiːfɚ/ noun6 •(slang, old-fashioned) A marijuana cigarette.'Most of the real hep-cats smoke reefers,' explained Leiter. 'Wouldn't be allowed most places.' — 1954 •(slang, old-fashioned) Marijuana.Daddy I don't want to go to school because the teacher's a jerk, he must think I'm a fool and all the kids smoke reefer, I think it'd be cheaper if I just got a job learned to be a street sweeper. — 1982 •(US) a refrigerator car (type of boxcar). •(informal) A refrigerated, insulated trailer, ship or shipping container.Was the dark of the moon on the sixth of June In a Kenworth pullin' logs. Cab-over Pete with a reefer on And a Jimmy haulin' hogs. — 1975 •A reefer jacket; a close-fitting jacket or short coat of thick cloth. •Someone who reefs sails, especially a midshipman.Her reefer cap was all on one side and on her cheek there was the print of an anchor button she had pressed on while sleeping. — 1922 formsreefers