When it comes to absurd and offensive characters, It's Always Sunny in Philadelphia has the market cornered. FX's series recently wrapped its 12th season, and it's already scheduled to come back for season 13. That's pretty impressive for a low-budget comedy about five degenerate bar owners. (I say that with love.) With St. Patrick's Day here, there's never been a better time to celebrate Charlie, Dee, Mac, Dennis, and Frank. Check out these 28 moments that perfectly describe your pub crawl experiences.