Cantonese Profanity : PoKai

仆 街 (puk gai / pokai) : literally means "falling onto street", which is a common curse phrase in Cantonese that may be translated into English as "drop dead". It is sometimes used as a noun to refer to an annoying person that roughly means a "prick". The phrase can also be used in daily life under a variety of situations to express annoyance, disgrace or other emotions.

Learning Cantonese Profanity from Wikipedia