DuckCorp Dico

Found one definition

1.                 From The Jargon File (version 4.4.7, 29 Dec 2003):
                   
   
   
                   
                     
   BUAG
    //, n.
       [abbreviation, from alt.fan.warlord] Big Ugly ASCII Graphic. Pejorative
       term for ugly ASCII art, especially as found in sig blocks. For some
       reason, mutations of the head of Bart Simpson are particularly common in
       the least imaginative sig blocks. See warlording.