1. Empty barrels are the most rumbling: People with the least substance (knowledge/skills) are the ones most likely to make the loudest/boldest claims.

2. Both for the courtyard and for the street: If a lady has both a big behind and bosom.

3. When the King of Diamonds was a Jack: (Referring to playing cards) Something that happened a long time ago.

Actually funny to think about idioms, I have heard since I was a kid but in another language :)