Banana dive 

It's when a father and son COUPLE (no exceptions here) are 69ing each other.

Those two seem really close, I'm sure they banana dive on the regular.

Banana dive by analslayer July 24, 2016

bananadine 

A mythical, euphoria-inducing chemical supposedly obtained from the inside of banana skins.

"Yeah, I hear that kid was trying to smoke bananadine."

bananadine by Blackdog January 19, 2004