humdinger

noun

1. (informal)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.”

   ““I’ve seen some humdingers, but never any ordinance like this,” said Mark Hayes, general counsel for the Arkansas Municipal League, an organization for towns and cities.”