Definition.com
A Zipper is two rows of unsmiling teeth that often induce laughter in others, es. when inadvertently left open following a trip to the toilet.
A Zipper is two rows of unsmiling teeth that often induce laughter in others, es. when inadvertently left open following a trip to the toilet.

Why do the Scottish wear kilts?Because a sheep can hear a zipper from like a mile away
Zippers are the number one cause of penile injury among adults in the United States.

The zipper was invented by the same guy who invented the sewing machine (Elias Howe 1851)

