"Unspoken expectations" refers to expectations or assumptions that are not expressed or communicated openly. They are things we assume others know or understand without explicitly stating them. Full definition
I'm arriving pretty late to the discussion here, but I had a hard time adjusting to marriage because of something you alluded to: unspoken expectations of what it means to be married. (omgchronicles.vickilarson.com)
@Luke: Admire the intention, but I reserve some skepticism, at least for now, on whether # 1 and # 2 can really be done independently of the already present spoken and unspoken expectations in the congregation, denomination and religion, as well as people's preconceived ideas of what church is (as opposed to what it would or should be). (nakedpastor.com)
You don't have to do every single thing together — and probably shouldn't, but here again is an area where unspoken expectations can lead to frustration. (relevantmagazine.com)