scarf? Is that an accepted American term? Or just a misspelling of scoff?

I can see what you're going for and it's close but not quite there. Love the concept though and look forward to more in the future!

Not sure about US Ace, but used in Aus and UK

@Plod: not sure it's used like that in the UK. Although I've not lived there for some years it certainly was not when I was growing up there.

It's only listed as a US usage in Oxford and Cambridge dictionaries, and as slang is some others, and I suspect it has indeed come from a distortion/misspelling of scoff.