na beh means: There are many ways to make “Ka Ni Na Bu Chao Chee Bye” sound like this. This is the most offensive phrase. Only use this if you don’t want to get beaten or want people to believe you were raised in longkang. Literally, “Fuck Your MotherFuck Your Mother’s stinky cunt.” This expression is most commonly used in Singapore. (in Community Dictionary, added by Moisés Torres)