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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

geeze doumani 

Geeze doumani is used as an exclaimation during the occurance of an absurd event.
*a dog does a cartwheel and disappears into the sky*
Adrian: Geeze doumani!
geeze doumani by LeTired March 18, 2008

Djuranovic 

Slavic last name that stems from a warrior bloodline.
That man has the heart of a warrior, he must be a descendant of the Djuranovic bloodline.

katherine dumandan 

Katherine dumandan is a short girl with many tall friends. she’s quite around people she doesn’t know but very loud with people she does know. She loves listening to music and hates having to deal with everyone’s bull sh*t :)
katherine dumandan is the most rad person you’ll ever come across
a turkish music band who composed the turkish revolution song
youtube.com/watch?v=IALDK63fhkw
PM of turkey : losers
duman : fuck you
duman by ccclitoris June 6, 2013
REGESTERED SEX OFFENDER
Duman fingered my dog, now she cant walk.
Duman by BREATHTAKING NIBBA August 28, 2019
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