xiǎo​xiōng​dì

younger brother/man

小兄弟 xiǎo​xiōng​dì
younger brother/man noun
a term of address for a younger male, either literally one's younger brother or as a friendly, sometimes slightly condescending or paternalistic, term for a young man.

Frequency

Movie subtitles
3.96 per million appears in 2% of films

Sources

Definitions
AI-generated definitions
Frequency data
SUBTLEX-CH