Scrumptious: Good enough to scrump?

This is another one with a “standard” definition and “slang” definition. When I searched for origins it came up as “unknown,” which doesn’t do me any good. So, here are the two definitions at least.

1. Splendid, delectable (as in food)
2. Something that is good enough
to eat or indulge in
(could be a thing or a person)

Interesting note: Urbandictionary.com also includes a word that means the opposite of “scrumptious,” but I’m not sure if it will catch on. “Scrumptless” leftovers, anyone?