To have a smooth tongue and honeyed words; to be adept at flattery and saying pleasing things, often with insincere motives.
他总是乖嘴蜜舌，很快就能赢得别人的好感，但大家也知道他言不由衷。
He always has a smooth tongue and honeyed words, quickly winning over people's favor, but everyone knows he doesn't mean what he says.
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