The name of the game is Rap Battles: The Game and it comes with a boom box and a die.  Players take turns rhyming at the cue of play cards, and that boom box there is not just a prop.  It actually plays beats for 20 seconds, which is the allotted time limit, until you say the phrase that pays.  Stack of crisp c-note Benjamins included.  Let me hear ya say… Ho… Ho!  ($30) Available here.