1. do something with a lot of effort
stop messing around! Put your back into it!
The expression put your back into it implies making a maximum effort to do or achieve something as quickly and effectively as possible. It is used to express an urgent need to get something done, to refer to doing something, especially physical work, with a lot of effort, or to encourage somebody else to do so. This expression can be used informally in both a social and professional context, and shares a similar meaning to the phrases 'go all-out,' 'give it everything,' and 'a bit of elbow grease.'