A couple of other favorites:

Perl would be Voodoo – An incomprehensible series of arcane incantations that involve the blood of goats and permanently corrupt your soul. Often used when your boss requires you to do an urgent task at 21:00 on friday night.

APL would be Scientology – There are many people who claim to follow it, but you’ve always suspected that it’s a huge and elaborate prank that got out of control.