A slur typically used towards nonbinary people who were AFAB.

• Archived Moe: 4Chan /lgbt/: 11/02/2018: I fucked up (https://archived.moe/lgbt/thread/11009281/#q11012477) - earliest known usage of theyfab on lgbt board on 4Chan


• Archived Moe: 4Chan /lgbt/: 11/16/2018: what's a theyfab (https://archived.moe/lgbt/thread/11085126/#q11111373)


• Archived Moe: 4Chan /lgbt/: 11/16/2018: A nonbinary Tumblrette special snowflake (https://archived.moe/lgbt/thread/11085126/#q11111489)


• Archive: Facebook: Star Amerasu: 06/16/2017: Me before some white theyfab haaaaad to let me know that they weren't a white woman after I sang Meg Ryan in MTL. (https://archive.is/C6kuM)


• X: 12/09/2016: zoe_zoestar: the former, talks about "theyfab trannies" which hMMMM. and even without it, is a stalker lmao. wish i didnt have to know lol (https://x.com/zoe_zoestar/status/807288640237928449) - earliest known usage of theyfab on twitter


• Wayback Machine: tumblr: pinky-rose: 11/17/2017: I'm "binary" trans instead of "non-binary" trans purely to make theyFABs with green hair not respect me and therefore not talk to me (https://web.archive.org/web/20250319215233/https://www.tumblr.com/pinky-rose/167575839785/im-binary-trans-instead-of-non-binary-trans)


• Urban Dictionary - Theyfab (https://www.urbandictionary.com/define.php?term=Theyfab)


• Wiktionary - Theyfab (https://en.wiktionary.org/wiki/theyfab)

See also the pages for; transandrophobia, transmisogyny, transphobia, binarism, intersexism, truscum, and gender critical.