To the upper echelon, that's excellent
The “upper echelon” refers to the legends in the game that respect his work. Obviously, Jay Z is included, as one of the most successful rappers of all time. But the other legend that Kendrick is alluding to is actually silently on this track: André 3000!
Kendrick famously played this track for him in the studio before it was released to the general public, after which 3 Stacks told him it was “excellent.”
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