The phrase "most lowdown" represents a colloquial term that highlights a person or situation's deceptive, dishonest, or contemptuous nature. Antonyms for this term might include "upright," "honorable," "authentic," "honest," and "forthright." These words imply a trustworthy and honest nature that is seen as admirable instead of shameful. Other antonyms could be "respectable," "noble," "distinguished," or "reputable." These terms all relate to someone or something that is held in high esteem and deserving of admiration. They represent the opposite of the negative connotation that "most lowdown" holds, highlighting positive qualities that are desirable in both people and situations.