小妹
xiǎo​mèi

younger sister

小妹 xiǎo​mèi
younger sister noun
youngest younger sister; general term for a younger sister

不要担心你的小妹。

bù​yào dān xīn nǐ de xiǎo​mèi.

Don't worry about your little sister.

female service worker noun
young female employee in a service role, such as a waitress, attendant, or assistant, often used as a direct form of address; specifically used this way in Taiwan
little girl
form of address for a young girl or any girl significantly younger than the speaker
little sister
humble way for a woman to refer to herself when speaking to peers
young female servant
young female domestic servant or nanny

Frequency
Movie subtitles
1.10 per million appears in 0% of films
Written text
5.16 per million

Sources
Frequency data
SUBTLEX-CHBCC Corpus (BLCU)