"Real humdinger" is an idiomatic phrase used to describe something exceptional, impressive, or very exciting.
Full definition
Looks like
a real humdinger of a roster there, and I'm sure you're excited about the postseason.
It's been a while since we've been leaked a treasure trove of documents with potentially earthshattering ramifications — but today's «Panama Papers» disclosure is
a real humdinger.
Alas, all good things come to an end, but what an end —
a real humdinger.
The better news is bolted behind this compact, hip - high roadster's snug cockpit: Opening the hatch reveals
a real humdinger of an engine from Toyota.
So, we bet you're thinking it's
a real humdinger with all that added zip?
District Court Judge Stan Billingsley, who, incidentally, owns LawReader) makes it sound like
a real humdinger:
We saved
a real humdinger for last.