DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   bennie \ben"nie\ n.
      a slang name for Benzedrine, a trademark for one brand of
      amphetamine; -- also used generically for any brand of
      amphetamine. [slang] [Also spelled benny.]
      Syn: Benzedrine.
           [WordNet 1.5 +PJC]