One hit of my piff and you cough
I got pot, top notch at minimum cost
Do me a favor: take your little nicks and get lost
The only time you get a P is when I'm pissing you off

from Slaughterhouse (Ft. SLV) – Who I Am Lyrics on Rap Genius

Meaning

The tree that Joell is puffin on is strong and good quality but Joell pays a low price for it.

Nicks = Nickel bag (smallest amount of weed any self-respecting dealer will sell)
P = Pound (Largest measurable amount that a dealer might sell you)

You won’t get a pound from him. In fact, the only P you get from him comes from his YAWOA!!

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