Slave away (at something)

Put one's shoulder to the wheel


Sgobbare

Spaccarsi la schiena


Meanings
To work very hard or tirelessly on something

Examples
I've been slaving away in the garden for months to deliver the freshest vegetables to your family and only now you tell me you hate vegetables!
Mi sono spaccato la schiena per mesi nell'orto per dare alla tua famiglia verdure freschissime e solo adesso mi dici che odi le verdure!

The final test was approaching but the student was not ready, so he slaved away for the last three weeks and he passed it
L'esame finale si avvicinava, ma lo studente non era pronto, perciò ha sgobbato per le ultime tre settimane e lo ha superato