Not this time of night

Not since that time I pulled a Norris.

Pretty often. And also Midland dialect words like miskin and ossroad that seem to be moribund. 

Only when describing most AIM resources companies as complete Norfolks.

Every time I take a Donald.

Only since learning that berk = Berkshire Hunt = khunt

A long time ago in a job interview at a prominent regional law firm I used the term 'boracic' thinking it was a legitimate synonym for 'impecunious'.  It didn't matter, they were no more sophisticated than I was at that time.

There's no such thing as the "Berkshire hunt".

It's the Berkley hunt in Gloucestershire.