spizerinctum
n.— «“I think the country is entitled to know he is young, vigorous, and full of spizerinctum.” [Sen. Alexander Wiley (R) Wis.] said spizerinctum was a word coined by an old banker in his town of Chippewa Falls, Wis., to describe someone full of pep and vitality.» —“TV Makes Ike ‘Look Old’” in Washington, D.C. Independent (Pasadena, California) May 11, 1956. (source: Double-Tongued Dictionary)
Further reading
If you speak a second or third language, you may remember the first time you dreamed in that new tongue. But does this milestone mean you’re actually fluent? And a couple’s dispute over the word regret: Say you wish you’d been able...
A flashlight doesn’t flash. It provides a steady beam of light. So why is it called a flashlight? The earliest versions lit up only briefly before the batteries gave out and required a recharge, so they were literally “flash lights...