The phrase "most nosing" can refer to someone who is overly inquisitive or excessively curious. Synonyms for this term include "intrusive," "prying," "meddlesome," "obtrusive," and "interfering." Other options include "nosy," "curious," "inquisitive," and "probing." Depending on the context, additional possibilities could include "investigative," "snooping," "eavesdropping," or "nosey-parker." These terms all imply a level of interest that goes beyond what is considered normal or appropriate, suggesting an inclination towards meddling or interfering in matters that are not within one's business. Choosing the right synonym can help to convey the intended meaning with precision and clarity.