Used to define that creepy uncle you have who isn't really your uncle at all. He usually is an old friend of your father's, has a mustache straight out of a porno, and drives an old white van with no windows (a common variation is a van originally equipped with windows, which have now been spray-painted over).
My peduncle is always rambling on about free candy and puppies
Dude, I think I just saw my peduncle on the news.
Really?
Yeah, he's wanted for gross sexual imposition.