When someone is walking, you make fart noises with your hands to the rhythm of their foot steps
Little did she know, the old woman was wearing duck shoes.
A brown penny-loafer with mold growing on the toe, sharing much the same color scheme as a mallard.
Hey man, your loafer is looking a little green on the end, it's starting to look like a duck shoe.
Those brown shoes, sometimes black, but usually leather, but usually worn by people who want to look preppy.
duck boots, prep boots.
He has on duck shoes 'cause he wants to look like a preppy boy.