what is the origin of oi
interjection. 1  Oi or oy has many meanings/origins. 2  In Britain, it's like Hey!, usually in a negative situation when you are angrily trying to get someone's attention, or when you're indicating you're offended by something someone just said.o link to this term in a web page or blog, insert the following. To link to this term in a wiki such as Wikipedia, insert the following. Some wikis use a different format for links, so be sure to check the documentation.