humdinger

noun

Etymology: US origin, perhaps a blend of hummer (“something that moves fast”) + dinger (“something outstanding”). First attested in a newspaper article in the Daily Enterprise of June 4, 1883, at Livingston, Montana.

1. Something that is particularly outstanding, unusual, or exceptional.

   “Most of the questions were pretty easy, but that last one was a humdinger.”

   ““—immense. I'm a real, slam-bang, honest-to-goodness, three-fisted humdinger. I'm a bona fide supraman.” “Superman?” Clevinger cried. “Superman?” “Supraman,” Yossarian corrected.”