The antonyms for the term "most smallfry" refer to those things which are big, important or significant. Words like "major" or "prominent" are considered antonyms for smallfry, indicating the opposite of something trivial or insignificant. "Mature," "experienced," or "distinguished" are also antonyms for most smallfry, indicating that the object or individual in question has reached a level of importance and significance not found in smallfry. In essence, antonyms for smallfry refer to things which are large-scale, important and influential, highlighting the difference between small or trivial and something with a significant impact.