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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
by T.Duffner September 01, 2013