Janis Joplin means in slang: She is by far the most famous female singer of all time. Big Brother and the Holding Company had her singing hits like “Piece of my Heart”, “Ball and Chain” and she went solo singing “Mercedes Benz”, “Bobby McGee” and other songs. Janis would kick Britney Spears if she was alive today. (in Slang Dictionary, added by Ignacio Blanchard)