Huat - 发
usually it means 发财, fortune.
E.g. Happy New Year, hope everybody huat this year! Huat ah!!

Jiayou - 加油
means Gambatte in Japanese, or literally "buck up"
E.g. jiayou on your studies! Means buck up on your studies! pull
up your socks!
Chiong - 冲
usually it means drinking alcoholic drinks in pub
also means, rush~
E.g. tonight wanna go chiong anot. Means, do you want to go
pubbing tonight.
E.g. Soldiers!! Chiong ar!!!! Means. RUSH soldiers!!!!