外後天 [－后－]

Jyutping ngoi6 hau6 tin1
Pinyin wài hòu tiān

Definitions (Wiktionary)
  1. noun, Xiang
    three days from now; two days after tomorrow
    (syn.) 落后日, 落後日, 大后天, 大後天, 大後日, 大后日