Here is a list of some common idiomatic expressions.
A bolt from the blue / A bolt out of the blue
This expression is used to refer to a sudden and unexpected event.
Have shot your bolt
When you have shot your bolt, you have done everything possible but still not succeeded.
Make a bolt for
When you make a bolt for the door, you try to escape by running towards the door.
Keep body and soul together
To keep body and soul together is to survive in very difficult circumstances.
If something costs a bomb, it costs a large sum of money.
Go like a bomb
To go like a bomb is to become very successful or to move very fast.
Bone of contention
If something is a bone of contention, it is a source of continuing disagreement.
Close to the bone
If a remark hits close to the bone, it is accurate to the point of causing discomfort.
If a joke or a story is close to the bone, it is near the limit of decency.
Have a bone to pick with
If you have a bone to pick with someone, you have a reason to quarrel with them.
Make no bones about
If you make no bones about something, you are direct in dealing with it.
Work your fingers to the bone
To work your fingers to the bone is to work very hard.