I am not a casual racist, or an overt racist, or any other type of racist. Nor am I ill informed or poorly educated, as has sort of been implied, although not actually said outright. I did explain upthread that I asked, rather than googled, because I thought it was the OP's own choice of phrase, not a commonly used term.
I didn't really want to get into the whole 'where I live' business, but I feel I sort of have to. I live in a rural area of N Ireland. Is it really all that unbelievable that I wouldn't have come across this, if it does indeed originate from Caribbean culture? There is no Caribbean descended community here, so the fact that it has passed into common use elsewhere doesn't mean anything here, because there is no one here to pass it on to us.
You might think I'm wilfully ignorant of other cultures, but why would I think to research something that I'd never heard of? In fact, how could I possibly research something I've never heard of, seeing as I've never heard of it.
I know a lot about Irish culture and tradition, things that probably aren't common knowledge in the rest of the UK. It doesn't make the rest of the UK prejudiced by default because they don't understand what I take for granted.
However, leaving all that aside, there is something very ironic about me asking for information on a topic, asking for an explanation, and then being scolded for being wilfully ignorant of the issues. If I was the sort of person who wasn't interested in learning about things, I wouldn't have bothered to ask.