脱裤子放屁

脫褲子放屁
tuōkùzifàngpì
  1. lit. to take off trousers to fart
  2. fig. to do something absolutely unnecessary
  3. fig. to make things too complicated

CEDICT

  1. (figurative, colloquial) to do an utterly unnecessary thing
  2. to do an utterly unnecessary thing

Wiktionary

（歇后语）多此一举。

重編國語辭典

多此一举

維基詞典

Entry Composition

1 脱裤 tuōkù
  1. (information technology, slang) to hack data of all users of a certain website
  2. to hack data of all users of a certain website
  3. to take off trousers
2 子 zi noun suffix, as in 椅子 yǐzi "chair"
3 放屁 fàngpì
  1. to fart
  2. to break wind
  3. to talk nonsense
  4. Utter rubbish!