We use MDD!! I coined this term one night after getting frustrated and having a lot of drinks. What's that, you ask?
MAGIC DRIVEN DEVELOPMENT
It's when you're working on a not-so-recent code base and are afraid to make any changes in fear of breaking things up. You've touched some modules, and now you restrict yourself to work only on those treating all others as a blackbox. Even if something can be achieved by a small change in one of the blackboxes, you still go for multiple changes in the modules you're familiar with! Such is the horror. You start saying that those modules work by some dark magic that nobody understands!