SMS language — Wikipedia
SMS language or textese (also known as txt-speak, txtese, chatspeak, txt, txtspk, txtk, txto, texting language, txt lingo, SMSish, txtslang, txt talk) is a term for the abbreviations and slang commonly used with mobile phone text messaging, but sometimes used with other Internet-based communication such as email and instant messaging.
Once it became popular it took on a life of its own and was often used outside of its original context. At its peak, it was the cause of vigorous debate about its potentially detrimental effect on literacy, but with the advent of alphabetic keyboards on smartphones its use, and the controversies surrounding it, have receded