Go pound sand!
I believe you mean schmuck. At least, schmuck means jewel in german.
I’ve always understood that “fuck you” was a shortening of the more meaningful “fuck yourself.” Besides, given that “fuck” is in the imperitive in that sentence, it works out to “(you) fuck you,” an ackward was of saying fuck yourself.
Putz in German = old word for Schmuck
Both can mean jewellery or hair/clothing accessories like bows.
There was a profession called “Putzmacher” (maker of nice decorative items), but the terms “Putz” and “Putzmacher” are obsolete in modern German.
schlong, from schlange, serpent
schwantz, tail