Define cosplay heart in simple terms. Costume play is all about dressing up and pretending to be a particular character from an comic book. It has become a huge sensation amongst enthusiasts of geek subculture around the world. People diligently craft costumes and props to accurately portray their favorite characters. Costume players usually attend gatherings or cosplay events, where they can showcase their creativity and meet others who share the same passion. Ultimately, cosplay is an manifestation of appreciation and dedication for the fictional character and a love for the nerd community.