地域黑 [－－－]

Jyutping dei6 wik6 hak1
Pinyin dì yù hēi

Definitions (Wiktionary)
  1. noun, neologism
    defamatory false statement that damages the reputation of a region (or people from that region); regional discrimination
  2. verb, neologism
    to libel people from a different region; to libel regions other than where one is