To be honest I don't like the term at all. I think that snakes that are very high yellow should be called that. High yellow. However if you are going to use the term, to me a banana represents the most extreme versions of this trait. You know where the snake is actually YELLOW LIKE A BANANA.
Recently it has become popular to call anything with a little yellow on it a banana. I think that these snakes should be called high yellow designers, or abberant coastal phase.
What I don't like is that where do you draw the line between a banana and an aberant? Its completely subjective, so anyone who wants you to click their classified add throws in the word banana.
Thoughts / opinions?
Here are some high yellows from Shores, mohr, and EBN. The only one called a banana was the middle one!






