With the advent of SMS, many common phrases were shortened to WTF, OMG, BTW, etc. And in recent years, with the increased use of these "acronyms", people have started using them in speech too: Saying "o-em-gee", "double yu-tee-eff", "bee-tee-dub" instead of "Oh my god", etc.
I don't mean acronyms or initialisms for nouns, like ATM, AIDS, FBI. I mean phrases that were shortened only to make writing/typing shorter, but ended up being used as acronyms in speech too.
Is there a name for this trend? (Other than 'being an immature teenager')