A low-ranking or incompetent official who collects debts or enforces minor laws, often used as a term of contempt.
From 'bum' (worthless or inferior) combined with 'bailiff' (a court official), this English compound emerged in the 16th-17th centuries as slang for a disreputable officer.
Calling someone a 'bumbailiff' was peak Elizabethan insult—it suggests they're so low-ranking they'd be better off not existing, combining contempt for both their job and their competence.
Complete word intelligence in one call. Free tier — 50 lookups/day.