Most snafu means something that is very messed up or chaotic. Therefore, the antonyms for most snafu would be words that denote order, efficiency, and organization. Some of the antonyms for most snafu could be words like smooth, seamless, flawless, efficient, well-organized, and well-managed. These words are used to describe something that is working or functioning properly without any interruptions or setbacks. In contrast to snafu, these antonyms indicate a situation or state of affairs that is well-executed, managed, or functioning in a systematic manner. Using these antonyms can help to describe a situation that is the opposite of most snafu.