WordNet (r) 3.0 (2006):

crash course
    n 1: a rapid and intense course of training or research (usually
         undertaken in an emergency); "he took a crash course in
         Italian on his way to Italy"; "his first job was a crash
         course in survival and in learning how to get along with
         people"; "a crash programme is needed to create new jobs"
         [syn: crash course, crash program, crash programme]