Wiktionary
file out
vb. To exit in one or more lines.
WordNet
file out
v. march out, in a file [ant: file in]
Usage examples of "file out".
He wanted you to come to them, out there in the country, read the file out there.
But as you read in my notes, I think subject has managed to get his file out of every central data bank.
And so we deduce that someone from the FBI took this file out—.
Only when he had finished did they rise and file out of the office.
The service finally ended and people began to file out of the church.