A ruski is not a definition of where you come from (it can be but not often) its a guy who can become Ruski, a Ruski can come and often come from actually Poland i do not know why but they are always from Poland.
-What is Ruski´s real name?
-Bro i think its like Oskar or something -Huh i always tought it was like something with R in the beginning.
A term commonly used in the hit game CS:GO. When a match starts (typically non prime) a kid asks this question which translates roughly to 'Are there any russians?'
Non Retarded Player:Hello fellow gamers let's win this!
Player:"heavy russian accent"Ruski jest?
Non Retarded Player:No.
Player:"heavy russian accent" Fuck you stupid cyka"quit's the match".