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Jyutping bat1 sin1
Pinyin bǐ xiān

Definitions (粵典–words.hk)
  1. 名詞
    一種​用筆​嚟​同靈體​交流​嘅​招​靈​遊​戲
    the pen fairy (similar to "ouija board")
    • 筆仙唔好隨便玩,好易惹禍上身。
      笔仙唔好随便玩,好易惹祸上身。
      bat1 sin1 m4 hou2 ceoi4 bin2 waan2, hou2 ji6 je5 wo6 soeng5 san1.
      It is better not to play "the pen fairy" without concern that it is really dangerous.

筆仙 [笔-]

Jyutping
Pinyin bǐ xiān

Definitions (CC-CEDICT)
  1. a form of automatic writing in which two or more participants hold a single pen over a sheet of paper and invite a spirit to write answers to their questions
  2. a spirit so invited
Examples (粵典–words.hk)
  1. Cantonese
    笔仙唔好随便玩,好易惹祸上身。
    筆仙唔好隨便玩,好易惹禍上身。
    bat1 sin1 m4 hou2 ceoi4 bin2 waan2, hou2 ji6 je5 wo6 soeng5 san1.
    • It is better not to play "the pen fairy" without concern that it is really dangerous.