I laughed when I first saw the word "exhausterator" mentioned, I scratched my head when I saw it the second time, and I came here after the third.
Besides making me feel like maybe technobabble isn't so far off the mark, the "exhausterator" is a very funnily-named component I keep running across in LR101 and H-1 documentation. What the heck is an exhausterator, what does it do, and why did they name it that? My best guess is that it's a ventilator for the turbopump exhaust, but it's clearly not designed to provide film cooling to the nozzle. I also know that LR101 and H-1s had nozzles that terminated in this funky component, so it wasn't film cooling for nozzle extensions either.
Why does the exhausterator exist?