黑不提白不提

hēibùtíbáibùtí
  1. (colloquial) to completely avoid mentioning something
  2. to completely avoid mentioning something

Wiktionary

Entry Composition

=1 黑 Hēi abbr. for Heilongjiang province 黑龍江 Hēilóngjiāng
=1 黑 hēi
  1. black
  2. dark
  3. sinister
  4. secret
  5. shady
  6. illegal
  7. to hide (sth) away
  8. to vilify
  9. (loanword) to hack (computing)
2 不提 bùtí to not mention
=3 白 Bái surname Bai
=3 白 bái
  1. white
  2. snowy
  3. pure
  4. bright
  5. empty
  6. blank
  7. plain
  8. clear
  9. to make clear
  10. in vain
  11. gratuitous
  12. free of charge
  13. reactionary
  14. anti-communist
  15. funeral
  16. to stare coldly
  17. to write wrong character
  18. to state
  19. to explain
  20. vernacular
  21. spoken lines in opera
4 不提 bùtí to not mention