Chunky Monkey refers to two separate cultivars:

Chunky Monkey Origin #1

Riot Seeds created its Chunky Monkey, also known as Platinum Banana Chunk, as a combination of Tom Hill’s Deep Chunk strain and a Platinum Banana OG Kush backcross. The top reported aromas of the Chunky Monkey strain are banana and earth. It is said to taste of herbs and tropical fruit.

Chunky Monkey Origin #2

Unknown breeders created another version of Chunky Monkey as a combination of Fatso and Grease Monkey. The top reported aromas of this version are coffee and skunk. It is said to taste of nuts, cocoa, and earth.