put your back into itinformalWORK HARD to work extremely hard at something 全力以赴,拼命 If we really put our backs into it, we could finish today. 如果我们加把劲,今天能干完。
put your back into it• Come on, John. Stop messing around and put your back into it!• I really put my back into it, you know?
→ put your back into it at back2(13)