When someone calls a plan or idea "half-baked," they mean that it is incomplete, poorly thought out, or not fully developed. There are many synonyms for this phrase, including "unfinished," "underdeveloped," "incomplete," "immature," "amateurish," and "unsound." Other words that can be used to describe something that is 'half-baked'include "hasty," "rushed," "vague," "sketchy," "loose," and "shoddy." All of these synonyms imply a lack of care, foresight, or attention to detail. Whether in relation to work, opinions, or personal plans, describing something as "half-baked" is never a compliment.