The word "most wayoff" doesn't officially exist in English. However, if we break it down, "most" refers to a superlative degree or quantity, and "wayoff" implies being far from accurate or correct. So, we can come up with some antonyms for these words. The antonyms for "most" are "least", "fewest", and "smallest". Conversely, the antonyms for "wayoff" are "accurate", "precise", and "correct". Therefore, some antonyms for the fictional word "most wayoff" could be "least accurate", "fewest imprecise", or "smallest incorrect".