dun

An importunate creditor. Dunny, in the provincial dialect of several counties, signifies DEAF; to dun, then, perhaps may mean to deafen with importunate demands: some derive it from the word DONNEZ, which signifies GIVE. But the true original meaning of the word, owes its birth to one Joe Dun, a famous bailiff of the town of Lincoln, so extremely active, and so dexterous in his business, that it became a proverb, when a man refused to pay, Why do not you DUN him? that is, Why do not you set Dun to attest him? Hence it became a cant word, and is now as old as since the days of Henry VII. Dun was also the general name for the hangman, before that of Jack Ketch.

And presently a halter got, Made of the best strong hempen teer, And ere a cat could lick her ear, Had tied it up with as much art, As DUN himself could do for's heart.

Cotton's Virgil Trav. book iv.