Hello! Can someone please tell me what this expression means in the following context: two guys are talking and one of them is an Italian who moved to Australia. The other (Australian) mentions a Jerry, and when the Italian asks what is a Jerry, he answers: "A Hun, a German, or something that goes under a bed". I have no idea what a German has to do with beds. And the source is a 1966 Australian movie called "They're a Weird Mob". Thanks!