Doc Martens
From Longman Dictionary of Contemporary EnglishDoc MartensDoc Mar‧tens /ˌdɒk ˈmɑːtənz $ ˌdɑːk ˈmɑːrtnz/ trademark a type of strong shoe or boot with laces, made from thick leather and stitched with thick thread. Their correct name is Dr Martens and they are informally called DMs.