The dregs from a rum barrel.
"I got sloshed from drinking the dunder." Hince the phrase, "He's a dunderhead."
viết bởi Mark Dunder 04 Tháng tám, 2003

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Top Definition
An alias for double underscore, "__". Specially useful in the Python computer language, in which names like "__init__" are common. Coined as a speech shorthand.
Eric: So the problem is initdata? (the method initdata() )
John: Nope, dunder init dunder is where things start to go wrong... (__init__)
viết bởi ajaksu 22 Tháng năm, 2006

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Dunder is a combination of the words dirty underwear.
"make sure to wash your dunders" "Dunderwear, clothes for the working man" "Dunderwear soft enoughf for a mans buttox, toughf enough to handle the swamp ass of a working man"
viết bởi Heyballookey2 22 Tháng mười, 2008

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A person who is utterly useless and incoherent. The IQ of this person almost always matches, or is close to, that of an average person's shoe size.
Dunder was unable to click the cube because his bandage was in the way.
viết bởi DDunder 28 Tháng sáu, 2007

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Polite word for fart.
What that a dunder, Geoffery?
viết bởi Its Calum! 26 Tháng năm, 2008

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Another word for drunk, or just really intoxicated.
Damn, i'm gonna be so dunder after this beer bong.
viết bởi Chase 03 Tháng tám, 2003

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