gaganster Share definition Flag A person that only dresses, listens to, is sexually attracted to Lady Gaga, but still acts like a gangster. Jamal: Yo, that homie is dressin ridikilous. Bo: Yeah man, hes a Gaganster gaganster by blackmen123 July 29, 2010 0 0 Get merch Get the gaganster mug. Buy Now — $32.95 See more merch