The best of both worlds- एक ही समय में दो अलग-अलग अवसरों का आनंद लेना।
E.g. By working part-time and looking after her kids two days a week she managed to get the best of both worlds.
See eye to eye- किसी के साथ सहमत होना।
E.g. They finally saw eye to eye on the business deal.
When pigs fly- कुछ ऐसा जो कभी नहीं होगा।
E.g. When pigs fly she’ll tidy up her room.
To kill two birds with one stone- एक बार में दो समस्याओं को हल करना।
E.g. By taking my dad on holiday, I killed two birds with one stone. I got to go away but also spend time with him.