Here's why:
* "Schuss" in German means "shot" (as in a gunshot) or "a quick dash." It's possible you're thinking of a German word that has been borrowed into Yiddish.
* Yiddish has a rich vocabulary, but "schuss" is not part of it. There might be similar words for "shot" or "dash" in Yiddish, but they would not be spelled "schuss."
If you can provide more context, I might be able to help you find the correct Yiddish word. For example, what was the word used in relation to? What is the sentence you're trying to translate?