Also a bitch because they are never supplied with equipment and are often forgotten when equipment is ordered.
Origin: A cage nut or caged nut consists of a square nut in a spring steel cage which wraps around the nut. The cage has two wings that when compressed allow the cage to be inserted into the square holes in equipment-server racks.
When someone is acting like a complete bitch to please someone else, but while doing so, they are being a complete tool.
Ew, did you see Karen at that party? She wanted that guy to sleep with her so bad, she was acting like a total bitchnut.