Oh, dude, it's like trying to fit a whole football team into a Smart car. Or, it's like being a sardine in a can, except the can is a rush hour subway train. So, yeah, crowded is basically feeling like a human Tetris piece in a game that you didn't even sign up to play.
like a crowd at a birthday party for loads and loads and loads and loads and loads and loads and loads of people lots and lots and lots of people were invited