What does "a flute busting" mean?

I was watching an ERB video and heard a phrase "a flute busting Prussian"

See Alexander the Great vs Ivan the Terrible - Epic Rap Battles of History at (https://www.youtube.com/watch?v=NVbH1BVXywY ,1:46)

I suppose it means something like "one who is blowing a flute" but I'm not sure if there's another slang meaning or something else.

Solution 1:

The video is explained at epicrapbattlesofhistory.wikia.com.

Frederick the Great:

(Psst!) What about a flute-busting Prussian?

(Frederick the Great enters, a shadow at first, to offer that perhaps he could defeat Ivan. Frederick the Great was a "Great" leader of Prussia who was prolific with the flute.).

(Old Fritz! Old Fritz! Old Fritz! Old Fritz! Old Fritz! Old Fritz! Old Fritz! Old Fritz!).

(Frederick builds up his verse with a flute solo as a series of voices chant his nickname, Old Fritz, derived from the affectionate nickname, Der Alte Fritz, given to him by the Prussians.).

I suspect that flute-busting Prussian simply sounded better than flute-playing Prussian ! Hard to be sure which of the multitude of slang meanings of busting is meant, some options from UD :

https://www.urbandictionary.com/define.php?term=bust e.g