MUDDER Meaning of MUDDER in English /mud"euhr/ , n.1. a racehorse able to perform well on a wet, muddy track. 2. an athlete who performs well in muddy conditions. [ 1900-05; MUD + -ER 1 ] Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012