Green’s Dictionary of Slang

yo’ mama! excl.

also yo mamma! yo’ Momma! you mama! your mama! your mammy!
[US black pron. of your mother! excl.]

(US black) a general excl. which, like motherfucker n., varies as to context, from the jovially teasing to the deliberately insulting; usu. used as a retort.

1942
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2000
[US]Z.N. Hurston ‘Story in Harlem Sl.’ in Novels and Stories (1995) 1003: If you trying to jump salty, Jelly, that’s your mammy.
[US]C. Himes Imabelle 114: You going to get some of your mama.
[US]C. Himes Rage in Harlem (1969) 113: [as 1957].
[US]H.E. Roberts Third Ear n.p.: yo’ mama an expression used to respond to another’s vituperative remarks in ‘playing the dozens.’ May sometimes be used as an apocopated form in signifying.
[US]Tom Tom Club ‘Genius of Love’ 🎵 Who that, who that trying to be bad, your mama!
[US]S. King It (1987) 709: ‘Yo mamma,’ Mike said, laughing harder than ever.
[US]S. Morgan Homeboy 137: ‘Whom ceased my music?’ [...] ‘Yo mama!’.
[UK]Indep. Rev. 10 July 8: Yo’ Momma! In yo’ face!
[US]C. Cook Robbers (2001) 4: Up yours sideways, asshole. In your momma’s mouth.
[US]F.X. Toole Rope Burns 175: ‘You the one that goin down, sucker. I whup you like a stepchild.’ ‘You mama!’.