Definition: Blacs are an ancient, ancient word that means "to bring back." In context, they are used in a figurative sense to describe returning things or people who have departed. For instance, if you were to say, "I thought I lost my friends," and someone replied with, "Blacs!" you would imply the person has forgotten about them. This phrase was often used during religious rituals as a way to bring back spirits or those who had passed on.