This is not an idiom. It means exactly what it says -- someone is putting their hands into their pockets.
To "get ones hands dirty" can mean: 1) to get involved in the details of something (such as a process, design, creation, or other often cooperative venture); 2) to get personally involved in some unsavory venture (often used when certain people, such as politicians, send others to "do the dirty work" of war, assassinations, etc., because they don't want to "get their hands dirty")
It means that the person doesn't want to take the responsibility for doing something unpleasant themselves, but gets someone else to do it.
'se mouiller' means literally 'to get wet /soaked'. As an idiom, it means "to get involved by taking (some) responsibility'. You would use 'to get one's hands dirty' as an equivalent in English.
To get your hands dirty means to do a job in all way including the unpleasant parts
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.
The word mitts refers to hands. Grimy mitts are dirty hands.
is it dirty
maybe he likes you?......
Dig in, work hard, and get the job done!
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.