Have you ever thought chewing gum may land you in prison? Yes, It’s happen! Chewing gum is completely illegal in Singapore since 1992. There is a ban on importing chewing gum into Singapore. Under the rule, only nicotine gum is allowed, but even then someone can get it from a doctor with a prescription. No gum is allowed to be bought or sold inside Singapore and there is a $500 fine for spitting out gum on the streets.