oomis,
Nosh certainly HAS made it into the secular vernacular.
We might be thinking about different non-Jewish vernaculars. In places like Wytheville, VA, Johnson, TN, or Huntsville, AL, many people would know what chutzpah means, but few would know nosh (at least when used as a noun). Maybe Bookworm120’s non-Jewish friend was an OOTer 🙂