The word Jakun is used to described a country bumpkin or greenhorn who is amazed by seeing something new for the first time. The word somehow entered the vocabulary of both the Chinese and Malays. Jakuns are an actual orang asli tribe and it is derogatory and disrespectful towards the Jakuns to associate them with ignorance and for being unrefined and uncivilized. I think the word is usually used without malice and it has no replacement or perfect synonym.
One of the most striking thing about Macau is the taxi driver don't talk in the journey from the airport and during other trips. Maybe it is just me but I hate chatty cabbies. When you arrive at a strange new destination, there are many things on your mind and you hate small talk. The Malaysian ones are horrible. Being down liners for some pimps, they will shock passengers with "Sir, you want young Thai chicken?" "You mean spring chicken? No thank you. I had some on the plane" I will reply.