to be boastful; to claim to be very powerful [colloquial]
Definitions (粵典–words.hk)
形容詞
擺出一幅自己好有料到咁嘅樣 to pretend to be significant or otherwise superior.
阿松佢考咗次第一就喺度扮嗮嘢咁。
阿松佢考咗次第一就喺度扮嗮嘢咁。
aa3 cung4 keoi5 haau2 zo2 ci3 dai6 jat1 zau6 hai2 dou6 baan6 saai3 je5 gam2 A-chung aces a single exam and now he's acting as though he's superior.