It is used is the following ways:
1. A Greeting - like Hello
2. A Congradulatory comment - like Good Job! or Cool!
* Other comments from the animation may also be used in conjunction, such as "H'yes" or "h'okay".
** "Good Good" a reference to a Family Guy episode, may also be used to humor the dialect.
Brian: Hello Sean
Brian: I just got a PSP!
Brian: H'yes, good good.
also widely used on popular social sites like; myspace, facebook, bebo etc.
typically in photo comments
reowww, paul is so hot.
or anything hot
reow that skyline is sexy
reow you look sexy jane in your new default
Person2 : Reow
Person3 : hahaha owned noob
Person1 : FML YOU C**T
PErson2 : Reow
Person3 : hahaha want some aloe vera for that burn?