I was reading an Amazon review just now, and came across someone (Tchaikovsky) being described as a right old roarer. I'm guessing this is familiar slang to Brits, but I'm not getting good search results, and it's a bit difficult to infer the meaning through context. What does it mean? Is it common use?
If this is the Amazon context you refer to,
it seems quite well-fitting with the slang definition of roarer
I've not come across this word myself before, so not sure how common this is in BrE.
Without the full context, I thought roarer meant "someone who communicates vocally in a very loud voice"
From Auden's As I Walked Out One Evening: