Define costume play in simple terms. Costume play refers to dressing up and pretending to be a specific character from an TV show. This trend has a massive trend amongst enthusiasts of geek culture around the world. People meticulously design costumes and accessories in order to faithfully represent their favorite characters. Cosplayers often attend conventions or costume play events, where they can exhibit their creativity and network with others who share the same passion. Ultimately, cosplay is an manifestation of appreciation and dedication for a fictional character and the love for the geek community.