I'll be the best until they stop the beating in my torso
This is a common rap sentiment.
For the beating in one’s torso to stop, means that their heart has stopped functioning, almost always signalling death.
This means that Thewz plans on not letting anything stop him from persuing his goal to be an incredible rapper, until he literally dies, signalling a complete and utter dedication to his art, and to the game itself.
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