A few years ago at my company, for various reasons if you performed a dangerous action you had to hold a large doll while doing it. This is no longer necessary and the doll is now gone from the office.
Today I posted
on slack to show I was doing this action and a coworker joked that the icon was now so stylised and turnover had been so high that most people who worked at the company had no idea what it meant - but everyone still used it to mean "I'm performing [ACTION]".
He then asked if there was a word for it, mentioning the "save icon" he used as a coaster on his desk.
I suggested cargo-culting but that doesn't really seem to fit. Equally linguistic drift applies to words rather than symbols.
My various google searches have turned up articles about how millennials don't know what the voicemail icon means and essays on how people read different things from emoji, but nothing useful.