Goot SHAB-bes, more properly transliterated, Gut Shabbes, is how a Jew says, “Good Sabbath” in Yiddish. It is the equivalent of “Shabbat Shalom” in Hebrew.
Yiddish is a Jewish language used originally by Ashkenazi Jews in Central and Eastern Europe. There are many Jews in the United States who speak at least a little Yiddish.
What’s the proper response to Gut Shabbes? That’s easy: just say Gut Shabbes right back!