BINGO
It is a gigantic bra. My mom loved that song. She might weigh 100 lbs. When we were listening to that song I said, "Look at that guy, his mother can't be any bigger than you." She laughed Sssoooo hard. The next day when I was dressing her I handed her her bra and said, "Here's your gigantic brassier" I say that every day now and she giggles.... Then I played the song for my grand daughter and I had her draw a picture. I improvised on the sewing machine with her drawing...
It would have been much easier to do "wiper blades" or "if pigs had wings"