to be fast at understanding or reacting to a situation.

He was quick on the draw answering the reporter's questions.

• There's no time to lose.
• There's no two ways about it.
• There's one born every minute.
• There's one for the books.
• There's safety in numbers.
• there's the rub
• There's the rub.
• the rest is history
• there's ... to be said for
• there's ... to be said for doing something
• there's ... to be said for something
• There, there.
• There wasn't a dry eye in the house.
• the road to hell is paved with good intentions.
• the roof caves in
• the roof falls in
• the rot sets in
• the rough and tumble of
• the rough and tumble of something
• the rub of the green
• the ... rung on the ladder
• the salt of the earth
• the same old same old
• the same old thing
• the same to you