whack
v. According to arch-hacker James Gosling, to "...modify a
program with no idea whatsoever how it works." (See whacker.)
It is actually possible to do this in nontrivial circumstances if
the change is small and well-defined and you are very good at
glarking things from context. As a trivial example, it is
relatively easy to change all `stderr' writes to `stdout'
writes in a piece of C filter code which remains otherwise
mysterious.
