左耳入，右耳出

zuǒěrrù,yòuěrchū
in one ear and out the other

CEDICT

Entry Composition

1 左 zuǒ
  1. left
  2. the Left (politics)
  3. east
  4. unorthodox
  5. queer
  6. wrong
  7. differing
  8. opposite
  9. variant of 佐 zuǒ
2 耳 ěr
  1. ear
  2. handle (archaeology)
  3. and that is all (Classical Chinese)
3 入 rù
  1. to enter; to go into
  2. to join; to become a member of
  3. (bound form) to conform to (as in 入時 rùshí)
  4. abbr. for 入聲 rùshēng
  5. (on product packaging, after {number n} + {classifier}) containing (n pieces) (from Japanese 入 "iri")
4 右 yòu
  1. (bound form) right; right-hand side
  2. (bound form) (politics) right of center
  3. (bound form) (old) west
  4. (literary) the right side as the side of precedence
5 耳 ěr
  1. ear
  2. handle (archaeology)
  3. and that is all (Classical Chinese)
=6 出 chū
  1. to go out; to come out
  2. to arise; to occur
  3. to produce; to yield
  4. to go beyond; to exceed
  5. (used after a verb to indicate an outward direction or a positive result)
  6. classifier for dramas, plays, operas etc
=6 出 chū variant of 出 chū (classifier for plays or chapters of classical novels)

Related entries

耳旁風 ěrpángfēng
  1. lit. wind past your ear
  2. fig. sth you don't pay much attention to
  3. in one ear and out the other
耳邊風 ěrbiānfēng
  1. lit. wind past your ear
  2. fig. sth you don't pay much attention to
  3. in one ear and out the other