BNC connector

A specific type of coaxial cable connector that locks into place with a quarter-twist. The meaning of the acronym "BNC" is largely ambiguous, with various interpretations such as "Bayonet Neil-Concelman", "British Naval Connector", "Bayonet Nut Connector", and others.

IT admin: "The telecom uses BNC connectors for their cable boxes, so we'll need to look into finding a vendor to buy some BNC cables from."
Inquisitive intern: "Alright. Hey, what does the 'BNC' in BNC connector stand for, anyways?"
IT admin: "Honestly, it used to stand for something, but no one really knows precisely what anymore. Just get creative with it, I guess."