I don't know but my flow, is so cold, mistah oh no
At your door, I'm ready fo' war

from Hopsin – Hot 16's Lyrics on Rap Genius

Meaning

Really this is just Hopsin giving himself more props as a rapper, he’s just saying that his flow is cold which is a common way to describe being able to rap well, and that he won’t hesitate to take you on if you want to go to war (battle him), so do you want it with Hopsin?

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