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.
by Poop DeDoop September 16, 2008
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.
by Sethxy September 26, 2009