A hipster is someone who buys records even if they don't have a record player, just to say they bought records. They listen to music that no one actually likes. Their taste in music is to make them seem cooler, by being non conformist, therefore making them conform to nonconformists. Hipsters tend to wear flannel and sweaters from flea markets.
Oh look at that hipster! I heard he listened to Sonic Youth to cover up his love for Rihanna.