xiǎo​xiōng​di

little brother

小兄弟 xiǎo​xiōng​di
little brother
a friendly or endearing term for a younger male peer or any young man
crony
a member of a close-knit group of male friends or associates, often implying a strong sense of loyalty or camaraderie
junior member
the smallest or youngest member of a group or organization (e.g., a small factory among industrial giants)

Frequency

Movie subtitles
3.96 per million appears in 2% of films

Sources

Frequency data
SUBTLEX-CH