Bié zài shuō piàolianghuà le, ná chū xíngdòng lái!
Stop with the empty pretty words — show some action!
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Strongly negative — 漂亮 ('pretty/handsome') is sarcastic here: words that sound nice but have no substance. Compare English 'lip service' or 'talk the talk'. The phrase usually appears with 说 'say' or 讲, often with 只会/只知道 ('only knows how to').