They're saying "oh, bring that real shit, something you can feel shit"
Numb to that dumb it down spun overkill shit
“They” could mean the hip-hop gods, or whatever force is telling him to make music, seeing as the song is about how he found his place in the world.
As evidenced by the beats on the entire album, “they” told him to make music that took hip-hop back to is organic, soulful roots, as opposed to the overused styles that are overkilled today.
To help improve the meaning of these lyrics, visit "That Real" by Oddisee Lyrics and leave a comment on the lyrics box