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1.
A moment of disappointment that occurs when you have a high expectation of accomplishment and experience a sudden let down.
What a bumdinger! I was supposed to get a promotion and now only have a 3 percent raise.
by Greg Walden November 30, 2005
 
2.
1)A homosexual man.
2)Or Sir Mix-A-Lot.
1)ew look at those bum dingers over there kissing
2) "I like big butts and I cannot lie..."
Butthead:"the dude's into butts.."
Beavis:"n'ya..heh-heh..heh.."
by smokin' da spleef mon September 14, 2005