哪門子 [－门－]

Jyutping naa5 mun4 zi2
Pinyin nǎ mén zi

Definitions (CC-CEDICT)
  1. (coll.) (emphasizing a rhetorical question) what
  2. what kind
  3. why on earth
Definitions (Wiktionary)
  1. pron, informal, used in rhetorical questions
    what; what kind of; what in the world
    (syn.) 什麼, 什么