It's an expression used more often by sports fans and I may have it wrong, but I always heard it getting out and doing, as opposed to sitting back and blabbing.
Minor case in point, our jerk-of-the-week, Professor Avery: he is what he is (waaaay over there on the Left) but when his e-mails got out, he didn't try to pretend it was a joke or a fake. (And to his credit, his opinion of air travel's feddie "Theatre, Security, A" and their nudie-scanners is as low as mine or perhaps yours). That's worth remarking on.
Take one of my fave examples, the guy from the county-seat Social Security office in the town where I grew up, who took an hour a week of his own time to go on the local cable TV access channel and explain, in tedious detail, various obscure aspects of applying for Federal help and related topics. --Okay, I don't approve of the system, but people who find themselves having to use it report the process is frustrating and confusing and here was one guy, trying to shed light.
It is a sobering thought that even in the rottenest regimes, there are honest civil servants, fair judges, decent cops and people willing to step up and do what they believe to be right -- they may be outnumbered, afloat in a diresome ideology, struggling under crummy laws, or trying to cope with a broken society, but they are there.
And in a world where most people just "go along to get along," there's a lot to be said for the few who are willing to put in some sweat, to "get some skin in the game," to put their efforts or the money to back up their words. Even when they're jerks, at least they stood up and did something. At least they stood for something.
...Still working on this line of thought but I'd rather have an honest enemy than a passionless, inert blob that just wants to follow the path of least effort.
3 weeks ago