Related:

• Yo momma has a short leg and walks in circles.
• If it walks, quacks, and looks like a duck...COOK IT!!
• Yeah, if it looks like a duck, and walks like a duck, and quacks like a duck -- shoot it.
• When I see a bird that walks like a duck and swims like a duck and quacks like a duck, I call that bird a duck.
  -- Richard Cardinal Cushing...
• if (quackslike() == duck) return(duck)
• Seems like this duck waddles into a pharmacy, waddles up to the prescription counter and rings the bell.
  The pharmacist walks up and asks, "Can I help you?...
• crop circles in the corn shell
• Great minds run in great circles.