A geekret is a secret
(computer geeks/tech-heads etc) keep to themselves in order to exclude "normal" people. It could be used to describe a useful piece of information that solves a problem, or an acronym
that is designed to exclude non-geeks.
I have spent years patiently closing multiple windows on my PC in order to view the desktop, then someone revealed a geekret to me that you press the Windows key with D to view the desktop.