Explain costume play heart in layman's terms. Costume play involves dressing up and pretending to be a specific character from a TV show. This trend has become a massive trend among enthusiasts of nerd culture globally. People carefully create costumes and props that accurately reflect their favorite characters. Costume players often participate in gatherings or costume play events, where they can showcase their creativity and network with like-minded individuals who share the same passion. Ultimately, costume play is an manifestation of appreciation and dedication for a fictional character and the love for the geek community.