wrats nest

from The Free On-line Dictionary of Computing (8 July 2008)

wrats nest

   <hardware, jargon> (From "wrap" and "rats nest") A
   {wire-wrapping} defect where all of the wire piles up around
   the bottom of the post instead of wrapping smoothly around it.
   It looks like a little bird nest.

   (1997-03-18)