Most pepped-up is a phrase commonly used to describe someone or something that is full of energy, enthusiasm, and excitement. However, there are many synonyms that can be used to describe this state of being. Some of these include vivacious, exuberant, animated, lively, enthusiastic, energetic, invigorated, thrilled, and pumped up. Each of these words can be used to convey the same level of energy and excitement as most pepped-up, and choosing the right one depends on the context in which it is used. In any case, using these synonyms can add variety and interest to your writing, and can help convey the message you want to get across.