It's used to refer to a turbo for combustion engines. commonly used In shinyodd's streams when he plays automation the game. I honestly don't know how he didn't realize what it is.
The single most awesomest chairs in the world; they provide enjoyment for people all over the word and if it weren't for them, most people that work in offices would've quit by now.
Boss: Ted, I want your article turned in by five o' clock this afternoon!
Ted: Sure boss. (mumbling to himself): Thank god I have my spinny chair, or by now I would've killed myself.