Wiktionary
fill-up
n. (alternative form of fillup English)
Usage examples of "fill-up".
After a quick fuel-tank fill-up, which Gamay also paid for, Neal set the trawler on a course that would take it into the open sea.
However, as soon as the gas in your car's fill-up pipe gets high enough to cover the end of the tube, a partial vacuum is created therein, which yanks on the diaphragm, releases the main valve, and shuts off the gas.
They were like the public water taps from the fill-up tanks, that cost you a penny a can, only this was private, people owned these tanks.