Can anyone tell me what the words "I'm too cool for school to act like this" mean in the following passage, that sounds at 34:55 – 35:15 in
Топ-модель по-американски 19 сезон / America’s Next Top Model College (2012) - Онлайн смотреть в хорошем качестве
She can't help the fact that she looks sexy in the picture 'cause she is a pretty girl. The only thing...every time I work with you, it still seems like you don't want it. And it's almost like, "I'm too cool for school to act like this or go all out." Like, say you come in for a casting. Well, I need you to act the fool for me right now. What are you gonna do? You can't just stand there and be like, "Uh... uh..."
Is it "I'm too cool to be taught to act like this" or just "I'm too cool to act like this"? What is "for school"? Maybe "cool for school" is an idiom?