Explain costume play heart in easy language. Cosplay refers to dressing up and pretending to be a particular character from a movie. It has become a huge sensation amongst fans of geek subculture around the world. Fans diligently craft costumes and accessories that accurately reflect their favorite characters. Costume players usually attend conventions or cosplay events, where they can exhibit their creativity and network with others who share the same passion. In the end, costume play is an expression of appreciation and commitment for a fictional character and the love for the nerd community.