Top Definition
something which is too good to be true, or something which is a real shit sitatuion to be in
Jeez dave thats a real hummdinger of a problem!
by cjklee March 06, 2005
1 more definition
an unexpected finger rammed up one's ass.
i got really drunk and my girl friend said to bend over, little did i know i'd be getting the hummdinger.
by grimmyshaw June 05, 2010

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