“…The format is inherently informal (Han and Baldwin, 2011 ; van Halteren and Oostdijk, 2012 ; Eisenstein, 2013b ), people write for their social networks (Eisenstein, 2013a ; Doyle, 2014 ; Eisenstein et al, 2014 ; Yuan et al, 2016 ), and unconventional spellings that pose challenges for traditional NLP applications nevertheless provide rich linguistic information as people engage in identity construction—often through intentionally representing their accents and pronunciation through innovative orthography (Jones, 2016c ). People also navigate linguistic taboos orthographically: as Smith ( 2019 ) notes, “most white Facebookers (and a few blacks) variably spelled nigga as n***a, nga, ninja, nucca, and nicca, betraying some degree of awareness of the word's taboo status in wider social circles.” The usefulness of social media data for investigating low-frequency forms, especially lexical items, is well established (see, e.g., Grieve et al, 2017 , 2018 ). One largely unexplored avenue of linguistic investigation, however, pursued here, is the use of social media as a window into rebracketing, reanalysis, and syntactic change (Eisenstein, 2015 ; Jones, 2015 ; Bleaman, 2020 ; Jones, 2016a , b , c ; Austen, 2017 ; Jones and Hall, 2019 ).…”