Nigh on Impossible

I worked at the NHS in Fulbourn first during the Swine Flu epidemic and then I worked in the CEO's office. I used to do dictation from his recordings so I would type up his letters and he would proof read them.

One time I was typing up a letter and heard something I wasn't quite sure if it was right. I must mention he was from Sunderland which is up north so they have some sayings that I have never heard of.

So I stopped and asked if this made sense "nigh on impossible"? They said  "yes" and that it meant something to the effect when pigs fly. I just thought I was hearing things wrong but here is a new saying for you!

All the Best!

American to Britain