nadger

nadger /nad'jr/ v.  [UK] Of software or hardware (not
   people), to twiddle some object in a hidden manner, generally so
   that it conforms better to some format.  For instance, string
   printing routines on 8-bit processors often take the string text
   from the instruction stream, thus a print call looks like `jsr
   print:"Hello world"'.  The print routine has to `nadger' the
   saved instruction pointer so that the processor doesn't try to
   execute the text as instructions when the subroutine returns.

   Apparently this word originated on a now-legendary 1950s radio
   comedy program called "The Goon Show".  The Goon Show usage
   of "nadger" was definitely in the sense of "jinxed"
   "clobbered" "fouled up".  The American mutation {adger}
   seems to have preserved more of the original flavor.