Don't bore us, get to the chorus!
Basically, it simply means "quit pussyfooting around, get to the point", or KISS (Keep It Simple, Stupid) or "say what you gotta say". The phrase is also the title of a greatest hits release from the Swedish band Roxette that I got in an HMV store in downtown Toronto, Canada. That album was probably released in Canada only.
Professor: Communism evolved as a warped corruption of scientific socialism, which was expounded by the German scientist Karl Marx, who was born in...etc, etc, etc....
Student (thinking): Don't bore us, get to the chorus!
Student (thinking): Don't bore us, get to the chorus!