Patzi

German Slang for a customer of illegal substances.

Mostly used in the city of Bielefeld by drug dealers

Terminology is uknown, most likely started as an inside joke for customers (junkies) who were "Patzig" or wicked.

Miclo is a patzi;

I scamed the patzi bad

Mashkal

An arabic word describing "Beef" or "Fight".

In Germany (popularized by Berlins residents) it is used as a slang term by migrants, wanna be gangsters and underworld personas.

Die Jungs waren unterwegs, es gab Mashkal;
The guys were Outside, they had Mashkal