I think the word comes from Yiddish, so it’s something I grew up hearing often in New York, and because of its origins I had never heard of anyone noshing on eminently non-kosher food. I don’t know that there’s much need for the word outside its origins. It’s mostly covered by the word snacking.
Oh, interesting — thank you! (I just thought it was some fad word that the media loved to use with Barry!)