From Longman Dictionary of Contemporary Englishthe (very) stuff of dreams/life/politicsthe (very) stuff of dreams/life/politicsXXexactly the kind of thing that dreams etc consist of an enchanting place – the very stuff of dreams → stuff
Examples from the Corpus
the (very) stuff of dreams/life/politics• Our ideas and hopes for the future are the stuff of life.• How does a political system handle the incredibly difficult and complicated value allocations that are the stuff of politics?• But such philosophical dissent, at this point, is the stuff of dreams in a dreamworld.• Within this realm the stuff of dreams and nightmares can coalesce from the very air.• This was the stuff of life. 