Khokhol
From Haircentric.com
Khokhol (Russian: хохол—khokhol, khakhol), a Russian name for an element of the haircut: a long lock of hair left on top or on the front of the otherwise cleanly shaven or shortly cut man's hair.
The word is also used by Russians as a derogatory name for Ukrainians, as it was a common haircut of Ukrainian Cossacks, historically often foes of Russian tsars (as well as of Polish szlachta and Ottoman sultans).
The Ukrainian name for this type of haircut is oseledets (оселедець, literally "herring") or chub (чуб, "crest"). There are several Ukrainian surnames derived from this word.
The khokhol / oseledets is a standard feature in the stereotype image of an Ukrainian Cossack, see e.g., the webcomic Salo in Space.
Interestingly, whether those who wear it are conscious of its origin or not, the khokhol hairstyle (in varying lengths) has found popularity in gothic, deathrock, industrial and related subcultures. It has been worn by members of many bands, sometimes spiked (as seen on the eponymous protagonist (and other characters) of the comic, Johnny the Homicidal Maniac by Jhonen Vasquez) or back-combed.