Idioms!

• on and off = not all the time, at irregular intervals. It's been raining on and off all day, I hate this kind of weather.
• over and out = message used to end a radio communication. Understood. Over and out.
• sink or swim = be successful or fail. This a very difficult job, you have to be careful. It's really sink or swim.
• up and about = in good health. After the accident, he recovered very well, he's now up and about.
• wait and see = wait patiently. We don't know if this government will be able to put his plans into practice. We have to wait and see.
• by and by = soon, in a while from now. By and by they came to an enchanted place.
• chapter and verse = with a lot of details. The teacher gave them chapter and verse about where to find the information.
• cheap and cheerful = simple, not expensive and of reasonable quality. This is really a cheap and cheerful Greek restaurant.
• cloak-and-dagger = secret and mysterious. It was a cloak-and-dagger operation in which several spies were involved.
• down-and-out = having no money. He's a down-and-out actor now.