'ah' is like 'kah','lah' suffix typical use by Malaysians. Some term will be used more by one ethnic group compare the others....where 'ah' typical chinese ethnic would use more and some cross uses...

Examples, Good ah, Good lah, Good kah, Ya kah, Ya Hor, Ya Lah, Ong ah, Huat ah.....where the Ong or Huat is hokkien term mean prosper...

Huah ah = Prosper Lah = Untung Lah