noun · derogatory or informal term for a man, often implying a rascal or joker

你这小子，竟然敢跟我开这种玩笑！

noun · a boy or young man, often used as a term of address or reference for a junior by someone of the older generation

那小子长得真像他父亲。

noun · a humble first-person pronoun used in archaic Chinese when speaking to one's elders or superiors

小子受教了，多谢前辈指点。

noun · informal term for a boy or young male

那个穿红衣服的小子长得虎头虎脑的。