Some should take this beat and make a 'Rest In Peace' shirt of it, cause
I killed it, now don't tell no one you heard of me

from Lil Wayne (Ft. Cory Gunz) – A Milli (Mixtape Version) Lyrics on Rap Genius

Meaning

As stated in the line before this one, he murdered the beat.
Shhh… just don’t tell anybody it was Wayne, no one will figure that one out

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