A Shabbos goy, Shabbat goy or Shabbes goy (Yiddish: שבת גוי, shabbos goy Modern Hebrew: גוי של שבת goy shel shabat) is a non-Jew who performs certain types of work (melakha) for a Jew on the Biblical Sabbath, work which Jewish Law (Halachah) enjoins the Jew from doing on the Sabbath. The phrase is a combination of the word "Shabbos" (שבת) meaning the Sabbath, and "Goy", which literally means "a nation" but colloquially and practically means a "non-Jew" (in Biblical Hebrew "goy" means simply "a nation", but in Mishnaic Hebrew it is used in the sense of "a non-national", i.e., "a non-Jew").
And we now know where YOU are coming from!!
An aunt of mine, a rich woman by our local standards, was Shabat Goy for her next-door neighbours, while being almost as anti-Jewish as you, Falcondule: people like to get on with their neighbours. An Orthodox Jew I've know for very many years thought those she lit the fire for were terrible Jews, leading others to work on the Shabat and break the Commandment. I don't know why I'm bothering to post this except perhaps to suggest issues are always a deal more complex than appears.