DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   mudcat \mudcat\, mud cat \mud cat\n.
      A large catfish (Pylodictus olivaris, formerly Leptops
    olivaris) of the central U. S. having a flattened head and
      projecting jaw.
      Syn: flathead catfish, goujon, shovelnose catfish, spoonbill
           catfish, Pylodictus olivaris.
           [WordNet 1.5] mud-dauber