The phrase "most put on" means something that is worn or displayed frequently. The antonyms for this phrase can be "rarely put on," "seldom worn," "infrequently displayed," or "scarce usage." These antonyms indicate that the item is not used frequently, and when it is, it is not considered as an essential element. It is often used for things that are either disliked or unnecessary. For example, a piece of clothing that one doesn't like to wear or a decoration that is not appreciated often. In short, the opposite of "most put on" implies something that is not important and doesn't hold a special place in someone's daily routine.