
In the first chapter we meet Matt whose nickname (big mouth) is the eponym for the book title, he is one of the main characters in the story. Matt is a student on Rocky River Highschool, he is described as brainy, a perfectionist and a comic character. While he talks with his friends about their drama project, two detective come in to arrest him. The first thing that comes to his mind is that something worse had happened with his family. But you don't get to know the reason for the arrest in the first chapter. I actually think that this hook is a brilliant way to cover the time till you get absorbed by the story.
The second chapter is structured like the first one, it introduces Ursula Riggs called "Ugly Girl" the second main character of the story. She is described as an very good athlete esspecially in soccer, field hockey and basketball. She is the captain of the girls' basketball team and their best player(maybe because she is so tall). Ursula behaves like a guy and also thinks like one, she misprizes the other girls and their behaviour.
The main content of the chapter is a important basketball game of Ursula's team which they lost against their archrival.Ursula and her teammates think they lost it because of Ursula's failures.
In the third chapter Ursula gets first confronted with the arrest of Matt and the accusions against him. But Ursula doesn't think that the rumour is true.
The arrest of Matt shows that the authorities are too stupid to understand that they are ruining the life of someone, I mean that's the worst thing that can happen to you. A lot of people say that everthing is going to be forgotten someday but that's not true. Matt is going to have a reputation as acriminal forever.
Ursula is the perfect boy, her thoughts are so unfeminine, esspecially the "warrior woman" thing, that she seems to be born into the wrong body. It would be interesting to know the reason for her behaviour , Freud would have had fun analysing her thoughts.