GNU Collaborative International Dictionary of English

Found one definition

1.       
   mulligan, mulligan stew n.
   1. A stew made typically of meat, vegetables, and any conveniently available ingredients; also, an Irish version of burgoo.
   
   Syn. -- Irish burgoo.
   
   [WordNet 1.5]
   
   
   2. (Golf) In informal and friendly games of golf, a permission to take another stroke without counting the previous stroke against the score, when a stroke was poorly played; a free stroke; as, “to take a mulligan”.
   
   [PJC]