"the whole nine yards"
A bragging phrase coined by the armorers of WW1 aircraft when "His pilot" would come back from combat having fired the entire 27 foot long belt of ammo that he had entered combat with ..
THE WHOLE 9 YARDS
but I think that came from the length of the belt of 50 BMG that the waist gunners on the B-17's used. After the original '9 yards' was expended, they had to start reconnecting belts from extra ammo cans.