What is the hink pink answer for a fat fish?

Here's why:

* Hink pink is a word game where the answer is two rhyming words that start with the same letter.

* Chubby and chub both rhyme and start with the letter "c."

* Chub is a type of fish, and "chubby" describes something that is fat.

So, "chubby chub" fits the rules of the hink pink game and describes a fat fish.