-Cantonese swear. Also known as pok gai/poke guy etc. In Chinese, it is written as "ไป่ก"
-Equivalent to "asshole/dick" or "Go die/
Go to hell/Damn it"in English.
-Could be a noun to call someone you don't like, a phrase to describe a bad situation, or something you shout out loud simply to express anger.
-Cantonese is very forgiving in grammar, especially when it comes to
profanity, so just use them any way you want.
Fun fact:
As "pok" means fall, and "guy" means street/ground. So the literal meaning of pok guy is to fall
down to the ground/ had a bad fall.