This stands for Trans Exclusionary Anti-Feminist. Unlike TERFs who are all feminists of one variety or another, and TEHMs, who are all cis-homosexual men, TEAFs can be men or women, some of whom might also be TEHM, some of whom might be cis-women, some of whom are cis-heterosexual men, some of whom are super-straight, but all of whom are anti-feminists. TEAFs do not endorse violence against transgender individuals, but neither do they support transgender ideology and politics.
It isn't just the TERFs and the TEHMs who want the transgender movement to disappear: it's the TEAFs, too.