I stay hotter than the sack keep
One to the head then I smash like a track meet

from Brotha Lynch Hung (Ft. Krizz Kaliko & Tech N9ne) – Don't Worry Momma It's Just Bleedin' Lyrics on Rap Genius

Meaning

It should say “Sac heat.” Referencing the temperature of Sacramento California, Lynch’s home town.
“One to the head then I smash like a track meet.” He will fire one shot into a victim’s head then flee the scene quickly as if he was participating in a track meet.

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