一笑置之

yīxiàozhìzhī
  1. to dismiss with a laugh
  2. to make light of

CEDICT

to laugh off; to dismiss with laughter; to make light of

Wiktionary

语本宋．杨万里〈观水歎〉诗二首之一：「出处未可必，一笑姑置之。」指笑一笑就把它搁放在一旁，表示不值得理睬重视或不当成一回事。

重編國語辭典

不理睬重视；不当成一回事

維基詞典

Entry Composition

1 一 yī
  1. one
  2. single
  3. a (article)
  4. as soon as
  5. entire; whole; all; throughout
  6. "one" radical in Chinese characters (Kangxi radical 1)
  7. also pr. yāo for greater clarity when spelling out numbers digit by digit
=2 笑 xiào old variant of 笑 xiào
=2 笑 xiào
  1. to laugh; to smile
  2. to laugh at
3 置 zhì
  1. to install
  2. to place
  3. to put
  4. to buy
4 之 zhī
  1. (possessive particle, literary equivalent of 的 de)
  2. him
  3. her
  4. it