1. (pejorative) An exercise in tuning (see
tune) in which
incredible amounts of time and effort go to produce little
noticeable improvement, often with the result that the code
becomes incomprehensible.
2. Aimless small modification to a program, especially for
some pointless goal.
3.
bit bashing, especially used for the act of frobbing the
device control register of a peripheral in an attempt to get
it back to a known state.