inside out
原文解釋: with the usual outside parts on the inside, or know something so much
中文解釋: 由內朝外, 或者 對某事徹底了解
已下為三個例句:
A. I always turn my jeans inside out to wash them.
A. He is wearing his jacket indise out.
A. Let me help you do homework. I know math inside out.