Finnfucker
An individual not related to Finland whatsoever who's recently had sexual intercourse with a finnish citizen.
D1: "Yo dude, the internship is going great, I banged Adalmiina yesterday and everything"
D2: "Shit bro congratz, you're a real Finnfucker"
D2: "Shit bro congratz, you're a real Finnfucker"