A house on stilts is a woman with a massive torso connected to two spindly, spider-like legs. She is the human personification of Baba Yagga's hut. She has the legs of a marathon runner and the upper body of a big fat sloppy American woman.
"Man, Maria is a real house on stilts. Look at the size of that chick's tiny legs! How do her legs even hold up that much bulk?"