Many cantonese slangs wouldn't make much sense if written out unlike mandarin. I suggest you try to talk to cantonese speaking people and listen to cantonese media.
thanks for your help *both* yeah i think that if i listen to media like movies mostly and music and look at the lyrics it would help. its just that my chinese was good but now it sucks lol THANKS
If your chinese was good in the past, then it should be pretty easy to pick up. It's the people who begin to learn cantonese from scratch that have the most problems.