But we hawk yo, right where you walk bro

from Cam'ron (Ft. Max B) – You Gotta Love It (Jay-Z Diss) Lyrics on Rap Genius

Meaning

In Harlem, Hawk can refer to watching someone closely with the intent to rob them, much like a hawk or another bird of prey eyes up something it is going to attack.
For example,

I was hawking that kid with the Jordans the other day, he looked like a soft target

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