sb. [f. verbal phr. to fill up: see FILL v. For the stress see BREAK-DOWN.] That which serves to fill up a hollow or stop a gap.
1872. Daily News, 2 Sept. They are falling by spadefuls into the cart, and have now to do service … as a fill-up for some pestilential ditch.
1883. Pall Mall G., 12 Sept., 4/2. The incident of the ‘Sempiternal Club’ … looks … a little like a ‘fill-up.’
