Riddonkulous

By myself, I might be literal or I might be slang, but in both cases I'm often unwanted. Simply add a ball, and I might be beloved. Take off the ball and add a y, and I become unclear. When I'm Hot, many people like to watch me. Pick me off someone's suit and they might thank you. If you're still me-y about what the answer could be, check out the additional hint.