Green’s Dictionary of Slang

(US Black) a kindred spirit, a like-minded friend.

1997		Royal Flush ‘Dead Letter’ 🎵 Put my a-alike to rest, I’m gonna stay here and live life up to best.
2006		Lord Jamar ‘Cipher’ 🎵 Back the fuck up, you ain’t my a-alike.
2012		Slaughterhouse ‘All On Me’ 🎵 My A-alike, I say it like we on some conscious shit.