I go Kanye, Jay-Z H.A.M., this the Summer of Sam
Flocka is referring to the Kayne West & Jay-Z song H.A.M., which means that he will go hard as a motherfucker".
“"Summer Of Sam” refers to a movie that is based on a spree of murders that happened in New York in 1977. In other words Waka will revive the story and make some killings!
To help improve the meaning of these lyrics, visit "Let Dem Guns Blam" by Waka Flocka Flame (Ft. Meek Mill) Lyrics and leave a comment on the lyrics box