Quote Originally Posted by bublinka View Post
As a native speaker I can say that I see this word for the first time in my life. I think it's professional term or professional slang.
Thanks, and I'm getting the visual now that it means something "banged out", "squeezed out" since бой means "hit", or implies some sort of violence, and из "out of" But it you say it is a pretty useless word I think that's enough. What do you think of my amateur, I am not a native Russian, etymology?
cheers!