The vocalisation and spelling-out of slash in writing seems to already be in use in colloquial contexts. Professor Anne Curzan from the University of Michigan gives examples from her students here:
Two weeks ago, one student brought up the word slash as an example of new slang, and it quickly became clear to me that many students are using slash in ways unfamiliar to me. In the classes since then, I have come to the students with follow-up questions about the new use of slash. Finally, a student asked, “Why are you so interested in this?” I answered, “Slang creates a lot of new nouns, verbs, adjectives, and adverbs. It isn’t that often that slang creates a new conjunction.”
She discusses the slang usage here as well.
This link cites definitions of slash from multiple dictionaries, as well as giving examples from an array of literature of where the spelled-out version has been used, i.e.:
The linguist Brett Reynolds, who blogs about language at English, Jack, has found a couple of examples from the 1990s.
This one is from the Sept. 28, 1992, issue of Time magazine: “Meet urban planner Campbell Scott (‘a realist slash dreamer’).” And this one is from the script for the 1999 movie Mumford: “sexual surrogate slash companion.”
Related to this, and in the same link, are examples of cum having been used in a similar fashion:
Although most standard dictionaries still consider “cum” a preposition, Merriam-Webster’s Collegiate Dictionary (11th ed.) recognizes it as a conjunction and has this example from George Bernard Shaw: “a credible mining camp elder-cum-publican.”
stroke is another one:
It could have been a pretty incognito look for the singer-stroke-actress, but paired with nude heels, an undone updo and aviators sunnies, she gave it serious sex appeal.
Languages are living/evolving forms. Where one thing works in one context, it might be totally out of place in another. As the author, trust your instinct as to whether your context will accommodate that slash. Since the question isn't about strict grammatical rules, there's really no right or wrong in my opinion.