As another commenter noted, it was loaned from Yiddish rather than German, although the two languages are very closely related. There are many Yiddish words in English that have come from the Jewish diaspora. Common ones I can think of are schlep (carry something heavy) and kvetch (complain loudly). Since this is Hacker News, the Yiddish word I think we use the most is glitch. Of course there are also words from Hebrew origin entering English the same way, like behemoth, kosher, messiah...