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Jyutping biu2 siu2 dai6
Pinyin biǎo xiǎo dì

Definitions (Wiktionary)
  1. noun, Min-Nan
    cousin (mother's sibling's or father's sister's son younger than oneself)
    (syn.) 表小弟, 表老弟, 老表, 表弟, 表阿弟, 表兄弟, 表弟弟