@TheDarkKnightYep, those are the usages that urbandictionary.com uses, describing both the looks and attitudes of those who are older and, not quite all there, like me! ;)
However, that's not precisely how I used it in my story (I've finally gone back, switched to another compatible older MacBook Pro laptop and am now restoring ALL the stories that M$ Word never ALLOWED me to correct, and there were a LOT of them.
Only, for whatever reason--probably because it's an incompatible version for an older system--LibreOffice crashes nearly continuously, so this is likely to take a very LONG time (I spent most of today on a single, incomplete story). So, my version of LO is most definitely decrepid!