Kill em all dead bodies in the hallway
from A$AP Rocky (Ft. 2 Chainz, Drake & Kendrick Lamar) – Fuckin' Problems Lyrics 2 on Rap Genius
Meaning
He killed everyone with his crazy rap flow, hence the dead bodies

“Kill em all” is phonetically similar to “K. Lamar”
He could be referring to having had sex(killing) with some girls simultaneously. They’re all wasted, lying around, sleeping, probably drunk, in the hall way (dead BODIES).
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