Someone with small balls, or a small pen*s. Doesnât always refer to actual pen*s size, but is often used to refer to a duster, someone who is terrible at something or simply stupid.
Person A: *Misses a layup in Basketball
Person B: Yo, you a smallie man!
Person A: Bro I canât get a girl
Person B: Thatâs because youâre a lilâ smallie