A person who preys or overly depends upon another in a parasitic manner; a leech or sponge. From Yiddish. Sarah made a point of setting out on her own as soon as she finished high school, but her younger brother has been something of a perennial shnorrer. Every group of friends has at least one shnorrer. You know the type, the one who mooches drinks and food off everyone whenever you go out.