Derives from the phrase "Blue Balls". When a person removes another persons headphones, or stops a person midsong just to make sure they can't listen, which causes the person extreme pain and makes them very volatile and angry. Never approach somebody who has been blue musiced as they will tear you a new one.
Person 1: *Removes headphones from music playing device causing blue musicing*
Person 2: *blue musiced and punches person 1*