Banana IQ has no widely documented original source and circulates mainly as a short soundboard and meme edit clip. The phrase itself became popular online because it is a mild, visual way to tease someone for a brain fade without being harsh. Short clips like this spread through group chats, gaming highlights and short-form videos, where a four second punchline can be reused in many contexts. Its appeal is its flexibility, as it fits school fails, sports bloopers and everyday mistakes equally well.