This is not an idiom. It means exactly what it says -- someone is putting their hands into their pockets.
If you "get your hands dirty" figuratively, you're willing to do the work yourself.
Nothing. You have left out part of the idiom. Perhaps you mean "your hands are tied," which means that you have no power to do anything in a given situation.
If you have your hands full, you can't do anything else with them, can you? This idiom means that you're overloaded and don't have time or ability to do anything else.
Isk
It either means he is embarrassed, or very uncomfortable. But if it's more casual, a man usually puts his hands in his pockets when he doesn't know what to do with them.
Nothing. You may be thinking of the idiom "plant your feet," which gives you the image of your feet rooted in the ground so you don't move.
Hands on checks will be conducted at all times.
It could mean anything... What does it mean when you walk with your friends? Lol.
It's a sports idiom. When the ball comes into play, it is on the field and in the hands of an athlete. When something comes into play, it is in action in whatever situation is being discussed.
The idiom "putting a spoke in the wheel" means to hinder or disrupt a plan or progress by creating obstacles or problems. It is used to describe actions that derail or obstruct someone's efforts or goals.
putting both hands or feet on the same hold or feature
Men would probably say it is to give a woman their money, but men are all individuals, so it could be a lot of reasons. They could be paying at a store, keeping their hands warm in cold weather, or any number of other reasons.