Bié zài shuō nàxiē guānmiǎn-tánghuáng de lǐyóu le.
Stop giving those high-sounding excuses.
Tips
usage
Often appears in the four-character phrase 冠冕堂皇 meaning "pompous and high-sounding" - usually with a sarcastic edge implying the words are empty.
memory
冠 = cap and 冕 = ceremonial crown; together they paint the picture of a fully crowned ruler - hence "dignified" or, when applied to talk, "pompously formal."