I didn’t even know what a shadow broker was, let alone a borker. Wikipedia helped with the first, urban dictionary for the intentional typo – satiric misspelling.
In the early nineties, Herb Miller led a product development project code named Silver Bullet. The team started collecting pairs of words where the first started with an S and the second with a B. This website is the continuation of that part of the project. Nowadays other projects display alternatives to their official acronyms on their websites.