Bié tīng tā yóuzuǐ huáshé de, shuō de dōu shì jiǎhuà.
Don't listen to his smooth talk — everything he says is false.
Tips
usage
油嘴 often combines with 滑舌 to form 油嘴滑舌 (yóuzuǐ huáshé), meaning 'glib and slippery-tongued'. The oil (油) metaphor evokes something slippery and untrustworthy.
memory
Think of 油 (oil) + 嘴 (mouth) = an oily mouth — slippery words you can't quite grab hold of.
