黑函

hēihán
poison pen letter (Tw)

CEDICT

taiwan

Entry Composition

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 函 hán
  1. envelope
  2. case
  3. letter
=2 函 hán variant of 函 hán