Written but not said; no phonemic representation, yet.

Just wondering what we would call words that have been created on the internet but haven't yet got a phonemic representation; their only exposure is in written form. lol, text, brb are some phrases that I commonly hear in spoken English: literally 'lol,' 'text,' 'b-r-b', but others such as ftfy and omw are only said fully: 'fixed that for you,' 'on my way', but are written down in short.