line noise

line noise n.  1. [techspeak] Spurious characters due to
   electrical noise in a communications link, especially an RS-232
   serial connection.  Line noise may be induced by poor connections,
   interference or crosstalk from other circuits, electrical storms,
   {cosmic rays}, or (notionally) birds crapping on the phone
   wires.  2. Any chunk of data in a file or elsewhere that looks like
   the results of line noise in sense 1.  3. Text that is
   theoretically a readable text or program source but employs syntax
   so bizarre that it looks like line noise in senses 1 or 2.  Yes,
   there are languages this ugly.  The canonical example is {TECO};
   it is often claimed that "TECO's input syntax is indistinguishable
   from line noise."  Other non-{WYSIWYG} editors, such as Multics
   `qed' and Unix `ed', in the hands of a real hacker, also
   qualify easily, as do deliberately obfuscated languages such as
   {INTERCAL}.