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The word Yinzo originates from the massive foreign gang called The Bosnian Mafia. Yinzo is slang for assault rifles that consist of high capacity magazines,including round drums and extended mags. The most popular AR used by the gang is the infamous AK47 that is referred in other gangs as a choppa or chopper. The Bosnian Mafia resides in Pittsburgh, PA, Manhattan, NY and St. Louis, MO.
Vlad: Hey Krevchinko, Are we using Yinzos on this job?

Krevchinko: Vlad, what do you think?

Vlad: Ill grab extra Drums
Yinzo by T.Duffner September 2, 2013
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A western-Pennsylvania bastardization of the phrase "you ones", which addresses more than one person. Since we "western PA people" do things like slur words together, replace almost all vowel sounds with a "schwa" sound (the upsidedown e in the dictionary), replace long "a" sounds with long "e" sounds, and refuse to pronounce any "t" that isn't the first letter of a word, this became "you-ens", then "youns", "yunz", and finally "yinz". Someone must have put this particular pronunciation and spelling in print at some point, since it seems to be the most accepted way to say and write it.

The aforementioned characteristics of our accent are probably at least partly due to the diverse heritage of the population of this area, which is mostly made up of Italian, Irish, Polish, Native American, and African American people, NOT inbreeding, as someone in an earlier entry stated.

The word has become associated with Pittsburgh in particular, whose natives are commonly referred to as "yinzers".
"Are yinz comin' up fer Chrissmiss?"

"What're yinz doin'?"

"I seen yinz at the fleamarket yesterdee."
yinz by Sam Sinister March 14, 2008
Related Words
Yinzo yinzonics yinz yinzer yino yizzo YiZZo Gang yindong yinong Yenzon
A provincial, typically residing in the western half of Pennsylvania (USA), who strongly identifies with the nearby city of Pittsburgh, Pennsylvania, often due to a fervent, pseudo-religious loyalty toward one or more professional sports teams headquartered there. "Yinzers" are so called because they speak a regional dialect of American English featuring the use of "yinz" or "yunz" as the second-person plural pronoun. Yinzers are the subject of a number of stereotypes, some of which they are actively proud and consciously reinforce to strengthen their sense of identity, an example being their use of French fries as a condiment.
Traffic in Pittsburgh is very bad this afternoon; a veritable army of YInzers has descended on the city due to the baseball game.
Yinzer by CAR_ July 4, 2018

Yonzo Hat 

A New Era Fitted cap that instead of being like the one's the players wear, is completely decked out with a collage of logos turned around which way, about 4 logos per square inch, A vareity of crazy colors that usually never match, holograms, pictures of dragons, etc.

Derived from the word Yonzo, somone who is a connoisseur of the style and rocks Yonzo hats/sweaters/shoes/tees constantly and is proud to rock the Y0nz label.
Wow, where'd you get that Yonzo hat.

Fuck, I went into West 49 and all the fucking have these days are yonzo hats and shoes.

"Don't fucking call me Yonzo."
Yonzo Hat by Yonz Affiliate July 20, 2008

yinzer justice 

A system of social mores that finds it not only acceptable but necessary to exact a broad array of punitive measures against an individual or individuals for heinous grievances such as defacing the Terrible Towel, stealing a parking spot saved by a parking chair, etc.
In a clear example of yinzer justice, the car was encased in a two-inch think layer of ice, courtesy of a old lady and her garden hose after the car's owner moved an old lady's parking chair and took her parking spot. The Pittsburgh Police have thus far refused to comment on the matter.
yinzer justice by sugapablo February 16, 2010
Yinuo, or, Wampus, is a rare creature that only appears in her favourite habitats such as the upstairs lockers. She enjoys playing cards and mastering the violin. Her brain is MEGA BIG and mainly caters for science-related knowledge. She is super pretty and will love her BFF until death do them part. Yes, this may be the only definition of Yinuo on Urban Dictionary, but that means that Yinuo is unique and one-of-a-kind.

So treat your Yinuo well, she may be the only one you ever meet.
Teacher: "Joyce Zhang?"
Joyce: "Here"
Teacher: "Tina Zhang?"
Tina: "Here"
Teacher: "Yi... Yeeno,... Yeenwo,... Yenwou.. Yin-
Yinuo: "Yinuo, yes, here..."
Yinuo by some_random_goose September 30, 2020
I yino'd that burrito.
Yino by Heavypants July 6, 2010