An insult used by non dutch people against dutch people.
It can either be used as an insult in order to mock a dutch persons pride in their language and nationality or as an insult towards dutch people in general.
Person 1: Hey did you see that Adriaan was flying a dutch flag in his backyard?
Person 1: what r u wearing?
Person 2: Who is this?
Person 1: chillin in clandestine. WHAT YOU WEARING?
Person 2: Please stop, deutshtard.
Person 1: *batheart* fail.
Person 2: Blocked.