I'd like you to remind yourself
Of what the fuck I can do when I'm on the mic

from Eminem (Ft. Pink) – Won't Back Down Lyrics on Rap Genius

Meaning

Eminem left the rap game for quite some time, he’s trying to show people what he is really capable of doing when he is rapping (on the mic).
He wants his audience or fans to remember the time where Slim Shady was at his best, mostly because he once again is

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