textspeak
noun [ U ] uk/ˈtekst.spiːk/ us/ˈtekst.spiːk/
火星文（短信用语）
the kind of language and spelling, often containing short forms of words, that people use when they are writing text messages
It was all in textspeak, saying things like "I am sorry 4 U." 全都用短信用语写成，比如 I am sorry 4 U。