The story
Cantonese 仆街 (puk1 gaai1, “fall onto street, drop dead, go to hell, [Singapore, Malaysia] to have no money)”), from 仆 (puk1, “fall”) + 街 (gaai1, “street”).
Etymology from Wiktionary, CC BY-SA 4.0.
pok kai
Today it means: Having no money; broke; bankrupt. Full definition →