Bare bottom swollen anus
From China Digital Space
光腚肿菊 (guāng dìan zhǒng jú): bare-bottomed swollen anus
In Chinese this sounds nearly the same as 广电总局 (guǎng diàn zǒng jí), the Radio Film and Television Administration. The administration is sometimes referred to simply as 光腚 or bare-bottom, as in this song that parodies the administration.