耍油嘴

shuǎyóuzuǐ ㄕㄨㄚˇ ㄧㄡˊ ㄗㄨㄟˇ

    • to talk glibly
    • to speak with a smooth tongue

Character by character

Saying俗语俗語

Idiom惯用语 · Rarely used now

Literally
play the oily mouth
Meaning
To talk glibly; usually written 耍嘴皮子. Mildly critical.

Sources