Dead 'em all and especially, leave a call on his mother voicemail
To say that he rest in peace,

from Kendrick Lamar – Rigamortus Lyrics on Rap Genius

Meaning

He’s not stopping at one rapper, he’s killin' them all!

Interesting that he’s gonna leave a voicemail on their mothers' phones, since on good kid, m.A.A.d city Kendrick’s mother leaves a couple voicemails for him.

Voicemail #1
Voicemail #2

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