In this lecture on Webdeleuze Gilles Deleuze states:

I would like to pursue the problem of the economy of flows; last time, someone wanted a more precise definition of flows, more precise, that is, than something which flows upon the socius. What I call the socius is not society, but rather a particular social instance which plays the role of a full body. Every society presents itself as a socius or full body upon which all kinds of flows flow and are interrupted, and the social investment of desire is this basic operation of the break-flow to which we can easily give the name of schizz. It is not yet important for us to have a real definition of flows, but it is important, as a starting point, to have a nominal definition and this nominal definition must provide us with an initial system of concepts.