1. Playing for keeps: Doing something with full commitment and determination, without holding back. It means the person is serious and won't give up easily.
2. Jump the gun: Act or speak too soon, before it's appropriate or the right time.
3. All of a sudden: Suddenly; without warning or expectation. This phrase emphasizes the unexpected and abrupt nature of an event.
4. The cat's out of the bag: A secret has been revealed or disclosed after being deliberately kept hidden. In Chapter 1 S.E. Hinton uses it by saying about Socs "their real thing just isn't groovy to talk about, their 'secret' (the cat), so to speak, is in their madras and madras alone".