DuckCorp Dico

Found one definition

1.                 From The Jargon File (version 4.4.7, 29 Dec 2003):
                   
   
   
                   
                     
   diddle
   
       1. vt. To work with or modify in a not-particularly-serious manner. “I
       diddled a copy of ADVENT so it didn't double-space all the time.” “Let's
       diddle this piece of code and see if the problem goes away.” See tweak
       and twiddle.
       2. n. The action or result of diddling.
       See also tweak, twiddle, frob.