Home › Words › M › mudstainmudstainmudstain means A spot or mark of mud that discolors an area.Among words judged in Lexicurio's Arena, mudstain ranks #11,462 of 42,749 for Qualifying.EtymologyFrom mud + stain.nounA spot or mark of mud that discolors an area.Definitions & examples from Wiktionary (CC BY-SA 3.0).