Nǐ mèi

Nǐ mèi literally translate to Your Sister in Mandarin.

You may think that it's friendly. Well think again.
It refers to "screw you!" in Mandarin.

When your friend fucks up a trivial thing, for example, when he orders the wrong burger at McDonald's.

你妹！我不是要的麦香鱼？(Nǐ mèi! Wǒ bùshì yào de mài xiāng yú?)

Translates to "Screw you! I said fish fillet!"

by 0riwasalvis November 23, 2022