Everything about "pox leber" as a minced oath, and an earlier source.

[Bluetoes101]

Not sure if it is of any use whatsoever, but I remembered "Samer pox/box/botz" was common in the examples I found previously.
I have no idea what any of these mean.. (translation tools do not have a scooby doo) so hopefully I'm not posting anything offensive... 

"kein wunder wers, sammer botz lung,
das mir vor leid mein herz zersprung."

"samer pox haut!"
"samer pox leichnam!"
"samer pox trost!"