Bum-Bailiff
Defined in 3 dictionaries — Cyclopedic (1922), Ballentine's (1916), Black's (1910)
The Cyclopedic Law Dictionary
Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
A person employed to dun one for a debt; the bailiff employed to arrest a debtor. Black thinks it a vulgar corruption of "bound-bailiff" (q. v.) Hall says that, from the notion of a humming or droning noise, the word "bum" was applied to dunning for a debt.
Ballentine's Law Dictionary
James A. Ballentine · 1916
A dun; a bailiff’s deputy.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
A person employed to dun one for a debt; a baillff employed to arrest a debtor. Probably a vulgar corruption of "bound-bailiff," (q. v.)