置之度外

zhìzhīwài
  1. to give no thought to
  2. to have no regard for
  3. to disregard

CEDICT

to leave (one's own safety or interest) out of consideration

Wiktionary

不以为意不加理会

重編國語辭典

事情放在心上不予理会

維基詞典

Entry Composition

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