twiddle

twiddle n.  1. Tilde (ASCII 1111110, `~').  Also called
   `squiggle', `sqiggle' (sic -- pronounced /skig'l/), and
   `twaddle', but twiddle is the most common term.  2. A small and
   insignificant change to a program.  Usually fixes one bug and
   generates several new ones (see also {shotgun debugging}).
   3. vt. To change something in a small way.  Bits, for example, are
   often twiddled.  Twiddling a switch or knob implies much less sense
   of purpose than toggling or tweaking it; see {frobnicate}.  To
   speak of twiddling a bit connotes aimlessness, and at best doesn't
   specify what you're doing to the bit; `toggling a bit' has a more
   specific meaning (see {bit twiddling}, {toggle}).