小姐姐

xiǎojiějie
  1. little girl who is older than another young child (e.g. her playmate)
  2. (neologism c. 2017) (slang) young lady (amiable form of address for a young woman of about one's own age or a little older)

CEDICT

neologism slang

Entry Composition

1 小姐 xiǎojie
  1. young lady
  2. miss
  3. (slang) prostitute

classifiers: 個, 位
2 姐 jiě older sister