It probably means programmers who are so "good" that nobody else wants to work with them. Thus the codebase is written by one single person, possibly over a sh

It probably means programmers who are so "good" that nobody else wants to work with them. Thus the codebase is written by one single person, possibly over a short period of time so they can keep everything in their head and then the program is never touched again in the following years. This way, that programmer can really feel good about themself and feel so superior about all those lesser programmer who have to use safer languages because they live in the real world