As with most things on the UK, probably. I definitely used Bobbins.

I used to think everyone called (cobs|bread cakes|rolls|barns) muffins, and it turns out it was just my small town that did it. As in, just my small town, not region, county, etc.

It's pretty common around Manchester. Bit like being nesh. But as you know... this is a thing: https://www.ourdialects.uk/maps/bread/

Might also mark you out as a certain age if not from the right region - I’m familiar with it as a word for “a bit rubbish” because of listening to Mark & Lard’s late night show on Radio 1 in the 90s