1. A way to describe someone's behavior when they are being crazy, insane, silly, spontaneous, funny, or wild.
Whenever Alexis and Nate hang out together, they are coo coo banana sandwiches!
9👍 2👎
The act of cumming on someones ass cheeks and then eating the butt out.
Joe: "Hey guys we need an example of a banana mayonnaise sandwich"
Aidan: "I really like that banana mayonnaise sandwich"