What does "kiasu", "ah beng" means? and what do they mean by "Malaysian Boleh"?

Kiasu means scared to lose. The chinese version is pa shu pa means scared, shu means lose. Ah beng refers to an uneducated person who speaks in a wierd way, at times with a slang. They sometimes dress differently too. For Malaysian Boleh, it means something like malaysia can do it. It is something like 'you can do it', except the you refers to malaysia.