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Jyutping soeng6 haa6 kei4 sau2
Pinyin shàng xià qí shǒu

Definitions (CC-CEDICT)
  1. to raise and lower one's hand (idiom); to signal as conspiratorial hint
  2. fig. conspiring to defraud
Definitions (粵典–words.hk)
  1. 語句
    比喻​玩弄​手段​,​暗中​作弊
    to conspire with somebody for illegal acts or transactions
  2. 語句
    近年​先出​現​嘅​用法​,​同本義無​咩​關​係​;​指用​手撫​摸​對​方身​體​嘅​敏感部位​,​即​係​非禮​、​性侵犯
    to grope (the upper and lower sensitive parts of the body); to commit indecent assault
    • 佢落吧嗰陣俾人上下其手。
      佢落吧𠮶阵俾人上下其手。
      She was groped when she was in the bar.
  3. 近義詞
    唱雙簧、扯貓尾
Definitions (Wiktionary)
  1. phrase, idiomatic
    to practice fraud; to manoeuvre for some evil end; to get up to tricks
  2. phrase, idiomatic
    to signal as conspiratorial hint
  3. phrase, idiomatic, neologism
    to sexually harass by groping
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    佢落吧𠮶阵俾人上下其手。
    佢落吧嗰陣俾人上下其手。
    • She was groped when she was in the bar.