一字膊 [－－－]

Jyutping jat1 zi6 bok3
Pinyin yī zì bó

Definitions (粵典–words.hk)
  1. 名詞
    露出​雙​肩​嘅​上衣​款式​（​量​詞​：​件​）
    off-the-shoulder top
Definitions (Wiktionary)
  1. noun, Cantonese
    boat neck