A game that has little gameplay and is mostly played to get random item drops which you can sell on a marketplace for minimal real world profit. most of the time the marketplace taxes you and gives a little bit of the money to the creator. the reason it is called a Banana game is because of the most popular example of this is a game called Banana on steam.
Person1: Man I've been making a lot less money from this game then I thought i would.
Person2: Well what did you expect from a Banana game, they are practically a scam.
A term to describe the act of vertical cutting along the urethra from the base of the top-hand side of the penis to the base of the bottom-hand side of the penis, then proceeding the peel the skin from the muscle of the penis down to either side, creating a banana-ish looking penis head.
Man I really hate that guy Peter, we should give him the ol' bananabald-cock to teach him a lesson.