verb; literally: one acting as a crab; run amuck like a crab; describe one to act capable when acutally not
Definitions (粵典–words.hk)
動詞
無料扮有料;扮到蝦蝦霸霸,好有架勢嘅樣;全句係「小蟹柳,扮晒蟹」 to act as if one is powerful; literally: to act like a big crab
佢呢份工返唔夠半年,就響度扮晒蟹,叫啲遲過佢入職嘅人做師弟。
佢呢份工返唔够半年,就响度扮晒蟹,叫啲迟过佢入职嘅人做师弟。
Having joined the company for only half a year, he acts as an old prick and calls the new joiners as freshmen.