驢打滾 [驴－滚]

Jyutping leoi4 daa2 gwan2
Pinyin lǘ dǎ gǔn

Definitions (CC-CANTO)
  1. snowballing usury; soybean flour cake
Definitions (Wiktionary)
  1. noun
    lüdagun (a type of Manchu/Pekingese snack made from glutinous rice, with a red bean paste filling)