That's bananas

Saying something is crazy, ridiculous, or just plain balderdash.

Going on impulse, not thinking about an action before doing it. Often a tool of peer pressure to make someone do something.

Something people look up on UD when they're bored.

It's a God damn fruit u dumb motherfucker

A fruit that Queen wants Kris to get it.

A banana is a measurement of length. Its use became common around the early twenty-first century, and has continued to remain in common English ever since. The original banana was defined as a curved yellow fruit that was 17 centimeters long; due to the great famine and subsequent death of many species, one banana is now nearer to 14.5 centimeters. However, one ISO banana is still defined as 17 centimeters despite the unit commonly being described as 14.5 centimeters.

If your banana tastes really good then you describe it as a "banana banana"

It is the way a banana should taste.
example: a banana flavored candy tastes like a banana banana but a regular banana is just a "banana", sooo if you have a banana that tastes really really good it is a "banana banana". noww if you have an even better one then Its "banana banana nana ana"