be all about (someone, something, or oneself)
1. To be focused on someone or something as the subject or topic. This documentary is all about the fashion industry. I think the book is really all about the ways that we deceive ourselves.
2. To be completely preoccupied with oneself. She's all about herself these days, so I doubt she even heard a word you said.
3. To be passionate about or very much in favor of someone or something. Yes I'd like one! I'm all about getting free stuff! I never liked them as a group, but I'm all about their solo projects.