I'm sick of holding back, Jay told me go harder
How else am I gonna prove I'm the number one author?
The Jay he is referring to is Jay Rock, fellow TopDawg artist and Black Hippy member.
“Harder” is a term in hip hop music which can be interchangeable with “better”. Its short version, “hard”, is used to describe lyrics and verses, i.e. “That verse goes hard”.
In other words, Jay Rock is telling Ab that he needs to step his game up in order to prove he’s the best rapper in the game.
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