hmmm
"the whole nine yards"
refers to the length of an ammunition belt on World War II fighters — when a pilot had exhausted his ammunition, he said he had shot off the whole nine yards. Or it was the amount of cloth in the queen's bridal train, or in the Shroud of Turin. Or it had to do with a fourth-down play in football.
https://www.npr.org/2013/01/14/169140590/-the-whole-nine-yards-of-what