talk the hind leg off a donkey
talk the hind leg(s) off a donkey
To talk endlessly and exhaustingly. I love my Aunt Lily, but she'd talk the hind legs off a donkey if you let her!
talk the hind leg off a donkeyBRITISH
If you say that someone could talk the hind leg off a donkey, you mean that they talk a lot. You won't be short of conversation with Adrian. He could talk the hind leg off a donkey.
talk the hind leg off a donkeytalk incessantly. British informal
In 1808 talking a horse's hind leg off was described as an ‘old vulgar hyperbole’ in Cobbett's Weekly Political Register , but the version with donkey was current by the mid 19th century. In 1879 Anthony Trollope mentioned talk the hind legs off a dog as an Australian variant.
1970 Nina Bawden The Birds on the Trees Talk, talk—talk the hind leg off a donkey, that one.