dummkopf
/ˈdo͝omˌkôf/ /-ˌkôpf/ /ˈdəm-
/noun
A stupid person; a blockhead.I experienced May 8 in Marienbad, as a seventeen year old dummkopf who believed in the final victory right up to the end....
- ‘Eh, it's Alex, that dummkopf,’ the other man said.
- ‘Don't be a coward and hide, French dummkopf,’ he spat the words out at the Frenchman.
Origin
Early 19th century: from German dumm 'dumb' + Kopf 'head'.