NOUN (1)

1. a cry expressing disapproval;


VERB (1)

1. utter catcalls at;

The Collaborative International Dictionary of English v.0.48:

Catcall \Cat"call`\, n.
   A sound like the cry of a cat, such as is made in playhouses
   to express dissatisfaction with a play; also, a small shrill
   instrument for making such a noise.
   [1913 Webster]

         Upon the rising of the curtain. I was very much
         surprised with the great consort of catcalls which was
         exhibited.                               --Addison.
   [1913 Webster]

WordNet (r) 3.0 (2006):

catcall
    n 1: a cry expressing disapproval
    v 1: utter catcalls at