Kartoffelkopf (potato head) is something that children would call each other. It doesn't really qualify as an insult.
The German word for potato is Kartoffel.
potato = Kartoffel
Dummkopf is a noun in German that means "stupid head" literally, so you can choose your insult in English: idiot, dummy, fool, etc.
Mrs. Potato Head
Schnell schnell car-top-fl-copf Lauf, lauf Kartoffelkopf!
Mr. Potato Head was created by George Lerner .
die Suppe - the soup
Potato Head Blues was created on 1927-05-10.
Potato Head Kids ended on 1987-02-25.
Potato Head Kids was created on 1986-09-24.
potato's
Yes. Potato pancakes are a German delicacy.