According to the Merriam-Webster Dictionary and Wiktionary, Flumadiddle(s) is something completely nonsensical or ridiculous; utter nonsense; cheap, worthless frills. According to Dictionary.com, it is an Americanism that arose in the 1840s as a combination of flummery, meaning “complete nonsense,” and diddle, meaning “to fool with.” It’s also the name for a savoury dish from the region around Cape Cod; click here to see the recipe.
I think it’s a word well worth rescuing from obscurity! In fact, it’s probably more relevant than ever in our modern “culture” (I use that term cautiously, as what some people consider culture, others consider flumadiddle). IMHO, flumadiddle could be applied to most television series, political speeches, internet “information”, and even many news articles. So add it to your vocabulary, and have fun!
The use of Darkling over time. Source: Google
Darkling comes from Middle English derkelyng, and the verb darkle is a back formation thereof. As a noun it means either darkness or a (fantasy) creature that lives in the dark. It can also appear as an adjective meaning dark or darkening, or something that is obscure, unseen, or happening in the cover of darkness. As an adverb it means in the dark or obscurity.
There is a Darkling Beetle, and a poem by Thomas Hardy called The Darkling Thrush, though the more usual use of the word is to be found in Science Fiction, e.g. in Star Trek Voyager, Marvel Comics, and a wide range of fantasy characters on the dark side of the fence.
According to the Urban Dictionary, you are a darkling if you are more sarcastic than charming, or if you are a geek, but a cool one. Another application might be a portmanteau word from dark and darling.