BUFF!
Big Ugly Fat ......!
Had one of these fly over me “lo&slo” souht of Gilette, WY in Wyoming in the early 80s. They were dropping flour sacks from ~500 feet.
Since I was the only car on the road within 200 miles on a Sunday afternoon, I suppose they wanted to have some fun and “give me the willies!”.
They did.
Big Ugly Fat Fellow, right? Kinda like Rear Echelon Mortar Fixers?