Definition: Known as Kongish, this is a code-mixing phrase that native Hong Kongers use to describe someone who is bragging about their achievements. (扮哂蟹 - baan6 saai3 haai5)Usage: E.g. A: Stop acting like a crab! You think you are better than me?!Synonym: 扮哂蟹Reference: https://zolimacitymag.com/pop-cantonese-大頭蝦-big-head-prawn-language-hong-kong/
