The phrase "most balderdash" implies that something is complete nonsense. Thus, antonyms for this phrase would indicate statements that are truthful, logical, or sensible. Examples of antonyms for "most balderdash" could include honesty, accuracy, reason, rationality, and realism. These words denote an approach to communication or thought that is based on factual evidence, sound reasoning, or practicality. Antonyms for "most balderdash" could also translate to phrases such as "truthful information," "logical arguments," "sound judgment," or "reliable evidence." In short, antonyms for "most balderdash" refer to ideas, statements, or arguments that are grounded in reality and can be supported by evidence or reason.