sweeper
n.— «Offset home mortgage loans were unveiled to the home owner in 1998, and have gained a great deal of respect from home owners since that time. Offset mortgage loans help to pay off a mortgage early by using what is known as a “sweeper” system. Providing that the home owner has their current and/or savings account with the mortgage loans provider, their available balance is “swept” across to their mortgage account each day to offset/reduce the amount of mortgage capital subjected to interest.» —“Home Mortgage Loans” by Adrian Dunbaker Best Syndication Sept. 16, 2006. (source: Double-Tongued Dictionary)