This is the 308th most frequent Danish word.
messerschmidt
"Messerschmidt" in Danish is slang for a know-it-all or someone who acts arrogantly smart.
In this sentence, 'messerschmidt' is used to describe someone who acts like a know-it-all.
Han opførte sig som en ægte messerschmidt, og ville vide alt bedre.
He behaved like a real know-it-all and wanted to know everything better.
In this context, 'messerschmidt' playfully refers to mess or chaos.
Efter festen lignede stuen en sand messerschmidt.
After the party, the living room looked like a real mess.
Here, 'messerschmidt' refers to an aircraft, particularly from the historical Messerschmidt company.