As a french person: it is in fact much like "plan B" but in a more "this wasn't part of the plan, in fact the plan calls for specific things that we are going t

As a french person: it is in fact much like "plan B" but in a more "this wasn't part of the plan, in fact the plan calls for specific things that we are going to improvise" way. I mean to say that when we say "systeme D", it has its meaning on its own, separate from what the words signify. It is also used when talking about alternate means of acquiring objects, such as bargaining (in the commerce sense) or repurposing trash.