On these snakes with the fangs that, poke through your denim
When ya move it accelerates the action of the venom

from GZA – Knock, Knock Lyrics on Rap Genius

Meaning

I think GZA is addressing haters in this line. They are out to get you and the more great music you make (“When ya move”) the more haters and critics you’ll have. (“It accelerates the action of the venom”)

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