Magenta8
I remember 'Steptoe and Son' popularised the word "Berk" meaning an idiot or a fool. It's a pity nobody at the BBC bothered to find out its derivation. Fortunately, the word seems have fallen out of fashion.
Oh goodness - I looked it up😳. I always thought it was a mild - even affectionate - term of abuse.
A phrase, rather than a word, that my mum used to say is '(he can) run up a shutter' meaning she wouldn't do what was being asked of her. Something like 'your Aunt Nellie wants me to help her weed her garden at the weekend, but she can run up a shutter'.
I don't think I've heard anyone else say it, and I've no idea of its derivation.