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.