The Collaborative International Dictionary of English v.0.48:

line-shooter \line-shooter\ n.
   a very boastful and talkative person.

   Syn: braggart, boaster, blowhard, vaunter.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

line-shooter
    n 1: a very boastful and talkative person [syn: bragger,
         braggart, boaster, blowhard, line-shooter,
         vaunter]