@kate something like this already happening with youth attaching ".exe" to indicate a poisonous or bad version of a thing/character. It probably stems from "don't open if it ends in .pdf.exe" or similar warnings regarding email attachments but seems to have gained a completely detached cultural meaning.
@kate pronouncing UwU could also be considered in the ballpark - while people are aware of the original emoticon meaning, it has also become a word.