wén​léi​shī​zhù

to hide the truth with clever words

闻雷失箸 聞雷失箸 wén​léi​shī​zhù
to hide the truth with clever words
To drop one's chopsticks upon hearing thunder; describes masking one's true feelings or shock with a clever excuse. This refers to a story from the 三国志 sān​guó​zhì where Liu Bei dropped his chopsticks after Cao Cao called him a hero, and then blamed the noise of thunder for his reaction.