低頭族 [－头－]

Jyutping dai1 tau4 zuk6
Pinyin dī tóu zú

Definitions (CC-CEDICT)
  1. smartphone addicts
Definitions (粵典–words.hk)
  1. 名詞、潮語
    諷刺長​時間​耷低​頭望​手​機​嘅​人​嘅​稱​呼
    people who always phub; phubber
Definitions (Wiktionary)
  1. noun, neologism, slang
    compulsive mobile phone users; smartphone zombies (as a collective)