两面三刀
liǎng miàn sān dāo
two-faced; double-dealing
Character by character
两liǎng
two
two
面miàn
faces
faces
三sān
three
three
刀dāo
knives
knives
Example
他当面一套，背后一套，真是两面三刀。
He says one thing to your face and another behind your back — so two-faced.
Tone: negative (criticism).
Usage and origin
Friendly to your face, scheming behind your back.
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