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Jyutping gaai3 mou5
Pinyin gà wǔ

Definitions (Wiktionary)
  1. verb, neologism, slang
    to battle each other in street dance
  2. verb, neologism, slang
    to dance awkwardly

尬舞 [--]

Jyutping
Pinyin gà wǔ

Definitions (CC-CEDICT)
  1. (slang) to battle each other in street dancing (derived from Taiwanese 較, which sounds similar to Mandarin 尬[ga4])
  2. (slang) to perform weird dance moves