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.

