Anticlimactic

Okay, so you know when you're watching a really exciting movie or going on a really fun adventure and you have high hopes for how it's going to end? You're waiting and waiting for something big to happen, but then... nothing really exciting happens. That feeling of being let down at the end, when you were expecting something really great, is called "anticlimactic." It's like going to a birthday party and getting really excited for the big present, but then it turns out to be a pencil or something else not very exciting. It can make you feel disappointed and like something important is missing.