A term used by yokels or rednecks to describe a good time, though if used in general conversation, the slap of rightousness may be employed to correct afore mentioned linguistic mistake.
gee ma, this sure is a humdinger of a meal
mate, this is is a humdinger of a party ... *SLAP groovy *SLAP ... ok what can i say *SLAP
1. A term used to describe the sexual act of a kneeling woman who is teabagging a ballsack and humming, all the while grooming the man's ass crack for dingle-berries. She does the grooming much in the same way that a monkey picks the bugs off another monkeys head.
The giver of a humdinger is useful in more ways than one to the receiver.