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Someone that fails before even attempting a task. Not intellectually capable of undertaking basic tasks and is likely to make a fool of themselves if they do. Historically tends to have bad luck and lacks some coordination in performing most activities.

Also abbreviated as Dumy or Dum.
"He was actually the biggest Duminy"

"I can't believe he acted like a Duminy"

"If his behaviour was any less professional, I would've thought that he was a Duminy"
Duminy by The King 2.0 September 29, 2013
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Generally used to refer to a Vietnamese male with the following specific appearance characteristics; long-sleeve thermal (black/white in color), a short sleeved polo shirt over the thermal (black/white/grey in color), designer brand jeans and/or black/grey Dickies, Vans/Converse (Chuck Taylors) shoes, exposed tattoos on either one or both arms (usually 3/4 sleeve to full sleeves. Common tattoos are Koi fishes, oriental dragons, chinese calligraphy, tiger, etc...) and a NewEra fitted cap worn a specific way as to where the cap sits/tilts lower towards the front on the head (usually on/covering the eyebrows) and higher on the upper back of the head (similar to how drill sergeants/state troopers wear their campaign hats).

The word dumani is singular, referring to only one person. Dumanis is plural. The word consists of "Du ma", a very vulgar Vietnamese cuss word.
Dumanis are NOT to be confused with Vietnamese gangsters, Dumanis typically look/act "hard/gangster" in appearance but will never do anything or fight anyone by themselves. a Dumani likes to "mean mug"/stare at other Dumanis in a taunting manner. Dumanis are mostly seen in Northen California but also seen in areas with a high Vietnamese population such as Orange County, Los Angeles, Houston, etc...

Any person(s) with the similar characteristics that is any other race/ethnicity other than Vietnamese would be called a "their race" Dumani-lookalike (i.e.: Chinese Dumani-lookalike, White Dumani-lookalike, etc...)
Look at this Dumani fool right here, I think he has a staring problem...
Dumani by BaoLeee! August 5, 2011
Related Words
duman dumpany damany duany Demanye Demanyea Demanyui Domany Duanyell dulany
This is a person you should keep your bitch away from at ALL costs because of his savageness he wil without a shadow of doubt fuck your bitch and send her to your crib 10 minutes later be weary of this sexy ass nigga
"Yo what happened to that girl you were talking to?"
"That nigga Damany fucked her"
damany by Acg February 11, 2015
Unwanted company that enters a public bathroom after you have already begun an embarrassingly loud or smelly bowl movement
"Sorry about the smell, I wasn't expecting dumpany."

The first few minutes were great, but then I had to be more courteous because some dumpany sat down in the stall next to me."
Dumpany by QuintoCT September 22, 2015
When you can't shit.
Person A: Brb gotta go to the bathroom
Person B: OK
Person A: FUCK DEMANYUI!!!!!!!!!!!!!!!!!!!!!
Demanyui by staygold678 July 18, 2007
a dump taken while on the clock at work
I just got paid for a dumpany. PS they really got their money's worth.
dumpany by Viso November 29, 2010
A devoted fan of sitting on Hungarian stools. Usually wear special greased leather shorts with a wide crack in the back to enable the entry of the cone.
Hey Domany, I see you got to the 20 inch line. Have a beer on my tab!
Domany by Feldermaus October 24, 2008