I'll compose a ballade extempore. A ballade?

You cooked up a brilliant story extempore.

It's an extempore! So, that's it guys. Just keep your cool.

We'll have to extemporize and experiment with what it is, when it is.

We'll have to extemporize and experiment with what it is, when it is.

But it is not a soldier's job to extemporize civilian police work, although they do it very well.

I saw it only a few minutes ago, and it is so manifestly unsatisfactory that I shall be extemporizing for much of the time.