What Exactly is a 'Wallhanger'?

[Spunjer]

seems like the term wallhanger means bad. what exactly does it means when you guys mention that such and such sword is a wallhanger? i mean if it means bad, how, pray tell, would you display your favorite sharp thingies? now im started to feel uneasy about some of my swords because they are hanging on the wall as we speak. it might not be VVV or Dajak quality, but nevertheless, at one point someone wore it around their waist and whoever he was, that person was happy with it. i bet you he hung the sword before he retire as well.