Especially in Jewish usage: a boy, a young man; a lad, a ‘kid’.
Origin
1920s; earliest use found in H. L. Mencken (1880–1956), author, editor, and journalist. From Yiddish boytshik from English boy + Yiddish -tshik, diminutive suffix (from a Slavonic language; compare Polish -czyk, Russian -čik).