Smallfry means someone or something of little importance or significance. Antonyms for smallfry are substantial, important, significant, and influential. Instead of smallfry, we could use terms like bigwig, heavyweight, tycoon, or mogul. These words suggest power, wealth and influence, as opposed to small and insignificant. In the same vein, other antonyms for smallfry include big cheese, kingpin, magnate, or titan. Using these words in place of smallfry demonstrates a greater level of importance and authority. Therefore, if we want to emphasize the importance of someone or something, we should use these antonyms over smallfry.