It's difficult to define a Finfag. You have to encounter one before you can truly understand their monkey-like nature.
However, a Finfag (sometimes spelled finfag) is a Finn (somebody who is from a country called Finland) whose IQ is lower than the number of his (Finfags are always males) shoe size.
Heaps of Finfags can be found in Call of Duty: Modern Warfare 2.
Finfag 1: "GO KRANE IT'S LSAT NCIE"
Finfag 2: "YES PLS I NED SUPSKIPPERS FOR MY YOUTOUB CHENEL!!1"
A narrow minded finnish person, aged usually 12-16, or whose IQ is below his shoe size. Finfags can usually be spotted by original insults such as 'your mom' or 'you suck', or if the person irritating a finfag is Swedish, '6-1' or 'Sweden be gay' -insults are a common sight. Shall the agitator be from Russia, Finfags will usually make a reference to two wars² fought 70 years ago, or again, to one hockey game'.
Finfags are known to appear only in the internet, mostly in youtube or CoD:MW2, but a variation of a finfag is very common in the real world, mainly in smaller Finnish cities;
These people are usually unable to operate a computer, yet use the internet, and mainly are employed by farming or truck driving, or some other low class job. Finfags shouldn't be confused entirely with rednecks, al thought they share some similar views.
(a herd of finfags has spotted swedish players in MW2)
Finfag: SWEDEN BE GAY
(a finfag gets beaten by a Russian player in MW2)
Finfag: RUSSIA SUKS!! 3-0 MIKAEL GRANLUND AIRWAVE GOAL!!
Russian player: åäåä öäüü¨ä?
(a finfag gets into an argument with an english person, and since the UK doesn't compete in hockey, finfag is out of arguments)
Britfag: Good game. Looks like you guys lost.
Finfag: YOUR MOM LOST
(a Finfag is in a common argument with a Swede who gives enough shit to say something back about hockey)
Swedish person: Well, we've got 2 olympic golds, and last time I checked, the olympics is the only competition that matters.
Finfag: SHUT UP GAY 6-1