That means you wear a costume and you dress up as something,’ captain america adult costume said Jamie Lee. In costume: ‘That means you wear a costume and you dress up as something,’ guardians of the galaxy game costumes said Jamie Lee. Cosplay fans dress up as a character often from popular anime or computer games. It’s not a theme,’ said Jamie. It doesn’t mean that it’s the end or you have to stop your dreams if your disabled or in a wheelchair.