A type of music that is most popular in Russia or Eastern Europe and people who are listing to hard bass are usually asassociated with Slavs wearing adidas, Slav squat, wearing ushanka, smoking cigarette, and drinking vodka.
When there the Russians defeated the Germans there was huge party in the center of Moscow and all the Slavs and Gopniks come in the their T-34 tanks boosting hardbass and drinking vodka.
A genre of dance and music which was popularized in Russia and involves large amounts of people, usually in Adidas tracksuits and leather vests dancing in public areas in an aggressive stomping fashion.
I saw some gopniks doing hardbass in the center of Moscow!