Someone who is a complete know-it-all on a particular topic is referred to as a badger. This is usually used as a insult and a basic indicator to remind them to shut the fuck up.
Steve: “The ils is an abbreviation for the instrument landing system this system is used to...”
Me: “Stop being such a plane badger Steve!”
Me: “Stop being such a plane badger Steve!”
by Inflatablelovelength January 11, 2018