Most prepped generally means being fully prepared or equipped for something. Antonyms for the term would be unprepared, under-equipped, disorganized, ill-equipped, insufficiently prepared, or inadequately equipped. In situations where someone is expected to be prepared, being most prepped would give them an advantage. Conversely, being unprepared or under-equipped would put them at a disadvantage. It is essential to be well-equipped and prepared in advance for any situation that may arise, whether it is for a test, interview, or outdoor activity. Therefore, being most prepped is always preferred over being unprepared or under-equipped.