The Trans Marco Theory is a popular fan-driven interpretation of Marco Diaz from the Disney XD series Star vs. the Forces of Evil. Fans have gathered various clues across the show’s four seasons, most notably Marco’s recurring 'Princess Turdina' persona and his internal struggles with traditional masculinity, to argue that the character is a trans girl. The theory gained significant traction within the LGBTQ+ community for its nuanced portrayal of identity and self-discovery. Usage of the meme typically involves highlighting specific 'egg' moments from the show or celebrating Marco as a trans icon. It serves as both a serious piece of media analysis and a lighthearted way for fans to see themselves represented in mainstream animation.