I beg to pardon - It's like a posh version of, 'What did you say?' but with a

It's like a posh version of, 'What did you say?' but with a lot more drama and a little bit of pride.

'I beg to pardon? I didn't hear you properly.'

'I beg to pardon? That was a bit of a shock.'

He said, 'I beg to pardon? What was that?' as if he had just been insulted.