Your name is mud
This idiom means 'you are not popular'. While escaping after shooting President Lincoln, John Wilkes Booth broke his leg. The doctor that gave him medical attention was Dr. Samuel Mudd. At the time, Mudd had no idea that Booth had committed the murder. Dr. Mudd was unfairly convicted of being a conspirator to Booth.




(来源：最老牌的英语学习网站 http://www.EnglishCN.com)