DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   blackleg
       n 1: someone who works (or provides workers) during a strike
            [syn: scab, strikebreaker, blackleg, rat]
       v 1: take the place of work of someone on strike [syn: fink,
            scab, rat, blackleg]