RichThesaurus
run off at the mouth
vs
talk the hind leg off a donkey
run off at the mouth
verb
To talk excessively.
To speak in a disrespectful manner about somebody.
talk the hind leg off a donkey
verb
To talk a lot.
How often have the words
run off at the mouth
and
talk the hind leg off a donkey
occurred in a corpus of books?
(source:
Google Ngram Viewer
)