This question already has an answer here:
So a friend of mine always works this type of joke into normal conversation and I always get a kick out of it.
Person 1: Why are you always hogging the TV remote?
Person 2: Because I am shellfish!
Obviously shellfish is not the correct word for that context, but it sounds similar enough that it works.
Basically what kind of joke is this called or what use of word replacement is that called?
P.S. Not required for a good answer, but if I wanted to respond to someone who has done this to me with the term "Grape job" what would be a good comeback/response?
I was thinking "well orange you nice", but feel like there is a more epic comeback that I just don't know of!