RichThesaurus
talk the hind leg off a donkey
vs
talk the hind legs off a donkey
talk the hind leg off a donkey
verb
To talk a lot.
talk the hind legs off a donkey
How often have the words
talk the hind leg off a donkey
and
talk the hind legs off a donkey
occurred in a corpus of books?
(source:
Google Ngram Viewer
)