Nod And Grin, Wipe The Chin

There's a reason for nodding and grinning, but what's the reason for 'wipe the chin(ing)'?

Nod And Grin, Wipe The Chin

As I was walking down the street,
I'd nod my head at all I'd meet.
They'd look at me, each with a grin,
Nod in return and wipe their chin.

Now, I was pleased with the grins I got,
But wiping of chins puzzled me a lot!
I tried to figure what that could mean.
It was the strangest thing I'd ever seen.

While walking through the hardware store
I noticed the phenomenon occurring once more.
People would nod as I wandered that place,
Wipe their chins and stare at my face.

I began to think how special I was.
I caused the world to erupt in a buzz.
They seemed to sense I had inner beauty
And paid attention to my civic duty.

The wiping of chins must be a new thing
To show the pleasure my presence could bring.
My ego grew, my heart filled with pride
As I paid for my hammer and ambled outside.

A mother and child were headed my way;
I knew that my smile would brighten their day.
I waited there for the nod and the grin.
The child yelled out, "There's egg on her chin!"