Green’s Dictionary of Slang

mine n.

also mines

(US Und.; latterly US black) myself, me; usu. as for mine.

[US]‘Hugh McHugh’ I’m from Missouri 24: The fence for mine.
[US]G.V. Hobart Jim Hickey 11: The woods for ours! Isn't this a bird of a place for a show to get stranded?
[UK]B.E.F. Times 20 Jan. (2006) 163/2: ‘Well,’ said Ferdy [...] ‘Its oats for mine.’.
[US]C.B. Booth ‘Mr Clacksworthy Within the Law’ Detective Story 13 Aug. [Internet] Mebbe he’d like t’ be stuck out here in this pocket-edition of a town, hearin’ the crickets sing [...] The roarin’ city fer mine!
[US] in T.I. Rubin Sweet Daddy 57: Why should I care? I got mine.
[US]L. Pettiway Honey, Honey, Miss Thang 79: I got into fights with girlfriends of mines.

In phrases

go for mines (v.) (also take care mines) [black var. on SE mine]

(US black teen) to look after oneself, to indulge one’s own interests.

Master P ‘Trick or Treat Whodi’ [lyrics] Game Face [album] Nah, fuck the world, I’m about to go for mines / Cause I’m trapped in this dream like I’m trapped in crime.
D. Carter LiveJournal.com 7 Nov. [Internet] Y’know? I got to take care mines first.