Based on the search results, "What in Hell is Bad?" is a mobile game developed by Prettybusy. It is a simulation game where players touch, move, and leave traces. The game is set in a magical world based on the Keys of Solomon, where countless devils and demons try to possess the player, who is the descendant of Solomon. The game is available for download on both the App Store and Google Play, and it offers in-app purchases. Therefore, "What in Hell is Bad?" is not a term or phrase related to a bad download.