So, no more slow-leakin, now he just got a flat
Flatline laid on his back flat, halftime (halftime)

from Lil Wayne (Ft. Juelz Santana) – Rewind Lyrics on Rap Genius

Meaning

Rewinding what was just said, Juelz re-states that the “slow-leakin'” (snitching) will stop when the victim is flatlined, or dead, taking a break, permanently, as if it was the halftime point of a sporting event.

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