DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   tat
       n 1: tastelessness by virtue of being cheap and vulgar [syn:
            cheapness, tackiness, tat, sleaze]
       2: a projective technique using black-and-white pictures;
          subjects tell a story about each picture [syn: Thematic
    Apperception Test, TAT]
       v 1: make lacework by knotting or looping [syn: tat,
            intertwine]