[-]

Jyutping naap6 nei4
Pinyin nà ní

Definitions (Wiktionary)
  1. intj, Internet
    (expressing astonishment) what?!

納尼 [纳-]

Jyutping
Pinyin nà ní

Definitions (CC-CEDICT)
  1. (Internet slang) what? (loanword from Japanese 何 なに nani)