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.
It could mean anything... What does it mean when you walk with your friends? Lol.
Hands on checks will be conducted at all times.
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 hands in pockets can be a sign of comfort or relaxation for some men. It can also be a way to conceal nervousness or uncertainty in social situations. It's important to consider the context and the individual's body language as it can vary in meaning from person to person.
It is not appropriate for a man to put his hands in your pockets. Either he is a pickpocket or a pervert.