Pronounced: PLAS-truhn, noun
Notes: This word has multiple meanings; I haven’t looked at the origin yet, but I suspect that the original meaning evolved into the later definitions (it’s one of those words).
The word scooby means “clue”
Background / Comments
To many people, seeing scooby reminds them of Scooby-Doo; I remember watching the original series (I think it was the original series) on Saturday morning cartoons (yes, back in the “dark ages” when we only had three television stations). This word does come from Scooby-Doo; as I noted yesterday, this is a rhyming slang word (“Doo” rhymes with “clue”).
A fairly late word; it began to show up in the early 1990s.