ETYMOLOGY
from clapper (the tongue of a bell; a talkative person’s tongue) + tongue
EXAMPLE
“…She has an e’e, she has but ane,
The cat has twa the very colour;
Five rusty teeth, forbye a stump,
A clapper tongue wad deave a miller:
A whiskin beard about her mou’,
Her nose and chin they threaten ither;
Sic a wife as Willie had,
I wadna gie a button for her!…”
From: The Scots Musical Museum
By James Johnson, 1792
Sic A Wife as Willie had – Robert Burns
Lexicophilia 