At work I often hear the greeting: "Frohes Schaffen!" Some time ago I was told that I should not use "Frohes Schaffen" as it is supposed to come from Nazi propaganda. Ever since then I feel ...
Due to german history (Nazi Germany, Stasi) there are alot of terms and phrases which can cause a very negative connotation. A simple invented example would be Der totale Sommer-Ausverkauf ...