Bite him like a piranha
Pirahnas are freshwater fish infamous for their sharp teeth and vicious nature. So when he says “bite him” he just means their going to hurt you.
He has also compared himself to a piranha in another song where he says:
thinking you can swim with piranhas
To help improve the meaning of these lyrics, visit "Heat to the Streets" by Royce Da 5'9" (Ft. Kid Vishis) Lyrics and leave a comment on the lyrics box