听说有个外星人是大帅比
[tīng shuō yŏu gè wài xīng rén shì dà shuài bĭ]
This username translates to 'It’s Rumored That There's an Alien Who Is Very Handsome.' It plays with the idea of aliens in popular culture being exotic or incredibly attractive. The phrase '大帅比' is a casual and humorous way to express admiration for someone's attractiveness, using '帅' which means handsome.