heavy wizardry n.
Code or designs that trade on a particularly intimate
knowledge or experience of a particular operating system or
language or complex application interface. Distinguished from
deep magic, which trades more
on arcane theoretical knowledge. Writing device drivers
is heavy wizardry; so is interfacing to X
(sense 2) without a toolkit. Esp. found in source-code comments
of the form "Heavy wizardry begins here". Compare voodoo programming.