Definitions of "Nah sell out"

Introduction to Jamaican Patois

So you want to learn how to speak like a Jamaican? Maybe you have Jamaican family members or friends and have a very difficult time understanding their thick accent, maybe you are a fan of reggae music and would like to know what those awesome sounding lyrics actually mean, or maybe you just want to know how to speak like a Jamaican because let’s face it, it looks and sounds pretty impressive.