The Double D refers to Dumb Donald from Fat Albert. In my memory, Mushmouth was the kid with the hat pulled over his face, and every time I would see a building with its roof pulled down past a story or two, I would grumble, “Mushmouth!” Turns out, I’ve been mis-muttering all these years.
Every once in awhile—more frequently lately—I’ve run across houses that are oddly large. It’s not that they are enormous, but rather out-of-porportion big, like they have been zapped by a grow ray. This is a good example.