Illustrate costume play plainly. Costume play refers to dressing up and pretending to be a particular character from a movie. It has become a massive trend amongst fans of geek subculture internationally. People thoroughly create outfits and props that accurately reflect their favorite characters. Costume players commonly attend gatherings or cosplay events, where they can display their creativity and network with others who share the same passion. Ultimately, costume play is an manifestation of appreciation and commitment for a fictional character and a love for the nerd community.