The infamous rapper Thugnificent moves to the neighbourhood with his friends Macktastic and Flonominal, eventually leading to Granddad becoming annoyed with his new neighbours. Their feud inspires Thugnificent to create a diss-track called "Eff Granddad".

Riley joins Thugnificent's Lethal Injection crew. Meanwhile, a local bully steals Riley's prized chain.

Granddad worries about Riley's sexuality when he notices that he begins to dress and act like "in-the-closet" rapper, Gangstalicious.