F66r question

[ReneZ]

In Germanic languages, the more specific part usually comes first, which is why we say "a red apple" and not "an apple red" (as one would in French). So why does it say "mush flour" and not "flour mush"? Wouldn't we expect a reverse word order, i.e. "melmuss"?

I have long suspected that this is meant to say "musmel" rather than "mussdel", but of course it was never more than a suspicion (still true today).
Conforming to what you write, this is not a type of "mus" (porridge) but a type of "mel" (flour).
To be more precise, it is a type of flour from which you can make a porridge.

While this may seem confusing, it is the same as "Suppenhuhn" (soepkip) from which you can make Huehnersuppen (kippensoep). Not sure if in English you would call this a soup chicken.

Now all this does not seem compatible with rubbing it on one's belly.