The "back" is the back of the body of a man in general or a woman, a human being. The back is what goes from the neck to the pelvis. It is really the back part of our body. It is the opposite of the belly, finally, the back. What is behind.
"Someone" is used to refer to an indeterminate person. We don't know who knows, so we can't name them by giving their first name, we name them by saying "someone". We just know that it's a person, we don't know what this person's name is, we don't know who they are. So, we use "someone" to refer to an indeterminate person,
The expression "to put on someone's back", we have not found a concrete origin, we do not really know where it comes from. There would be, as is often the case with idiomatic expressions, several possible explanations. One of them would be to imagine that responsibilities, the things that we must do, are weights that are heavy to bear and that if there is something heavy to bear, a great responsibility, and we put it on someone's back, well it becomes heavy for them, it is a difficult burden to bear to have a great responsibility on your back. And that, we will say, is an image that allows us to understand the meaning of this expression.
"Put on someone's back" is used today to say that we accuse someone of something, we shift the responsibility onto someone, in fact we find a culprit. Something has been done and we say australia whatsapp number data that it is a person. We accuse them, we give them responsibility, we say that it is their fault, we find a culprit. And to say all that, we have a nice idiomatic expression which is "put on someone's back".
I will give you several everyday examples that will allow you to understand exactly how we can use this expression.
The first of them, imagine, you have several children in a room and there is a stupid thing that has been done and we don't really know who did it. And then, there is a child who points the finger at another to say: "He's the one who did it stupid". And then, the child defends himself, he says: "Oh no! You're not going to put that on me. I didn't do anything". So in fact, he says: "No, you're accusing me, you're giving me the responsibility, you're saying that I'm guilty, but it's not me. Don't put that on me, don't accuse me". Do you understand the mechanism of using this expression?