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Jyutping hoi1 ngoi6 gwaa3
Pinyin kāi wài guà

Definitions (Wiktionary)
  1. verb
    to use cheating plug-ins and/or softwares

開外掛 [开-挂]

Jyutping
Pinyin kāi wài guà

Definitions (CC-CEDICT)
  1. see 開掛|开挂[kai1 gua4]