I found another "poxleber"

[Koen G]

Oops, you are right, I did not read the full passage, I was more interested in finding out the origins of the text.

The "sommer" is of course a "so mir". A Hans Sachsism afer all!


Edit to be more explicit:

"sommer box leber" = "so mire Gotts leber [hilfe]" = "so help me God's liver".

While this sounds silly to us, it was the most vulgar kind of swearing one could do in the Middle Ages. By the time of this text, and in its satirical genre, it was apparently acceptable in print.