The act of eating a penis. Named after the case of Armin Meiwes (first proven case of canibalism in Germany) who killed and ate a guy from Berlin after they had gay sex and shared the penis of this guy as a meal (yes, he wanted to be eaten).
Used in whole Germany do discripe this gay-canibalism-thing except for Berlin.
In Berlin "Berliner Würstchen" means Gay 69.
A: Hast Du hunger?
B: Nein, ich hab nen Berliner Würstchen verputzt.
A: Du bist wirklich krank.
A: Are you hungry?
B: No, I just ate a Berlin Sausage.
A: You are really sick.