The turkey that swallowed the sparkplug

Posted by Chester on November 27, 1999

Recently I read a sentence offering a colorful image (aural image): "He was giggling like the turkey that swallowed a sparkplug."

Now, is it an expression with some currency? Is it an original invention of the writer? Is it a genre of corn-ball writing? -- some vein of folksy phrasing?

If it's a genre, does anyone know where phrases of this sort may have been collected -- a book I mean?