What is "jingle shell"

Jingle \Jin"gle\, n.

1. A rattling, clinking, or tinkling sound, as of little bells or pieces of metal.

2. That which makes a jingling sound, as a rattle.

   If you plant where savages are, do not only entertain them with trifles and jingles, but use them justly.
   --Bacon.

3. A correspondence of sound in rhymes, especially when the verse has little merit; hence, a rhyming verse of no poetical merit. `` The least jingle of verse.''
   --Guardian.

   Note: The verses used in commercial advertisements are often called jingles, especially when sung.

   Jingle shell. See Gold shell (b), under Gold.