There are several synonyms for the phrase "most unmethodical". These include haphazard, chaotic, disorganized, unsystematic, erratic, unplanned, disorderly, scatterbrained, and random. Each of these words conveys a sense of disorder or lack of structure. Haphazard refers to something that is done without planning or order. Chaotic implies a complete lack of control or order. Disorganized suggests a lack of coordination or structure. Unsystmatic means lacking a clear, organized system. Erratic implies unpredictable behavior. Unplanned suggests lack of forethought. Disorderly implies a lack of order or regard for rules. Scatterbrained implies a carelessness and confusion. Lastly, random refers to something that is done without order or predictability.