Eat beaver and thine sin shall be forgiven, pretty sure that's what she said...

Hmm, you must have misread something. It translates to "mouth bags" or more specifically "mouth-of-an-animal bags".

my partner refers to all pasta as "spaghetti" and it drives me up a wall

It's a case of "parallel evolution".

Burrito comes from the slang word used in Mexico to call a taco or corn tortilla, which can be traced back to 500 BC in Mesoamerica.

Dürüm comes from the Latin word durum, meaning a type of wheat artificially selected around 7000 BC in the Near East.

Since neither the Mediterranean cultures had corn, nor the American cultures had durum, it's just a case of "can make flour, add water, slap a thin layer on a flat stone, and heat it up".

In the present day, both can be made with wheat, and have similar fillings, except dürüm is filled with döner kebab meat which can't contain pig, but a burrito can contain anything.

If anything, it's the other way around

Yeah. I am not a native speaker of either language though, is "shitting sb." something one might say?

Anyway, the etymology, as I understand it, is:

• Herr Gott/Herrgott: "Lord", or literally "Mr God", typical way German-speaking Christians address God
• bescheißen: screw, bullshit
• -erie: French feminine noun ending, sometimes used as the English "-er"

So yeah, you could translate it as "thing to bullshit the Lord", or "Godbullshitter".