form of divination similar to the Ouija board, in which participants use their forefingers to push a small saucer over a sheet of paper inscribed with numerous Chinese characters
Definitions (粵典–words.hk)
名詞
請仙嘅方法之一；請仙嘅人會喺一隻碟仔上面畫個箭嘴，將隻碟放喺通靈紙上面，然後用手掂住隻碟仔，問碟仙問題。問完問題，隻碟就會自己郁來郁去，當佢停低果陣，個箭咀指住嘅就係碟仙嘅答案 to communicate with spirit through a dish