dun for

dun (someone) for (something)

To nag or bother someone to pay money owed. Don't answer the phone—creditors keep dunning me for money that I just don't have right now.

See also: dun

dun someone for something

to harass someone to pay a bill or deliver something. If you don't pay the bill, they will dun you for it day and night. My job is to dun people for payment of their bills.

See also: dun