A Rastaman is a man who follows Rastafari, the Jamaican faith and way of life that grew in the 1930s. In that community men often wear dreadlocks, keep to ital food, listen to reggae, and honour Haile Selassie of Ethiopia as a holy figure. Rastaman is the street and song word; Rastafarian is the tidier dictionary word for the same person. It names a man. A woman in the same faith may be called a Rastawoman, though many people just say Rastafarian for anyone. Insiders use Rastaman with pride. Outsiders sometimes stretch it to mean “anyone with dreadlocks” or “anyone who likes reggae,” but that is loose: plenty of people wear the look without belonging to the faith. Using it as a costume or a joke can feel cheap. It is not an insult in Jamaican English.