算老幾

Simplified: 算老几

suànlǎojǐ ㄙㄨㄢˋ ㄌㄠˇ ㄐㄧˇ

    • just who do (you) think (you) are? (or "just who does (she) think (she) is?" etc)

Character by character

Saying俗语俗語

Idiom惯用语 · In everyday use

Literally
to count as which number in the birth order
Meaning
Said contemptuously of someone who has no standing or qualification: 'who do you think you are?' Rude.

Sources