事不关己，高高挂起

事不關己，高高掛起
shìbùguānjǐ,gāogāoguàqǐ
to feel unconcerned and let matters rest (idiom)

CEDICT

Entry Composition

1 事不关己 shìbùguānjǐ a matter of no concern to oneself (idiom)
2 高 gāo
  1. high
  2. tall
  3. above average
  4. loud
  5. your (honorific)
3 高 gāo
  1. high
  2. tall
  3. above average
  4. loud
  5. your (honorific)
4 挂起 guàqǐ
  1. to hang up (a picture etc)
  2. to hoist up (a flag)
  3. (computing) to suspend (a process)
  4. (of a system) to hang
  5. pending (operation)