clapper

What it means

1. One who claps; a person who applauds by clapping the hands.
2. An object so suspended inside a bell that it may hit the bell and cause it to ring; a clanger or tongue.
3. A wooden mechanical device used as a scarecrow; bird-scaring rattle, a wind-rattle or a wind-clapper.

   "Sir, sir! folks' tongues go like the clappers in the fields to drive away the blackbirds. A very little wind makes 'em rattle wonderfully."

   1896, Sabine Baring-Gould, Arminell, a social romance, Ch. 37

In a sentence

"Sir, sir! folks' tongues go like the clappers in the fields to drive away the blackbirds. A very little wind makes 'em rattle wonderfully."

1896, Sabine Baring-Gould, Arminell, a social romance, Ch. 37

Where it comes from

From clap + -er.