know something inside out
to know something extremely well · to have a comprehensive understanding of a subject
What's the situation?
Ever met someone who's just *the* expert on a topic? Like they practically wrote the book on it? 🤓 This expression is perfect for describing someone (or even yourself, humbly of course!) who has a super deep, thorough understanding of a subject, project, or process. It means you know all the little details, the pros and cons, the history, and pretty much anything you could possibly ask! It's super handy in business when you need to highlight expertise. ✨