Happy Banana 

A form of currency in a drug country. ( Colombia and others).

I went down South where I exchanged Happy Bananas for a couple keys.

Happy Banana by Chingate Au Wa February 26, 2007

Banana Happy Tree

A tree on or near the property of an asian person that has banana peels thrown in it. The peels are usually thrown in the tree by non-asians.

Tom: Hey Sam, want to go make some banana happy trees?
Sam: Yeah that sounds fun, ill go grab a bunch
Tom: Great, I really want to hit up the Pings today
Sam: Me too, after we can get the Pongs!

Banana Happy Tree by Where's Tardo? March 7, 2011

Is that a banana in your pocket or are you just happy to see me? 

Usually said to someone when it appears that they have a boner.

Said to embarass/draw attention to said person

Banana can be replaced with a multitude of things, i.e cucumber, pencil, roll of quarters, mint container, etc.

Guy 1: *walks into room*
Guy 2: Hey is that a banana in your pocket or are you just happy to see me?
Guy 1: *looks down*
Everyone: *Laughs*

Is that a banana in your pocket or are you just happy to see me? by Neon Ninja Kills You November 1, 2009

HappyBanana 

A gleeful banana full of joy and wonder.

HappyBanana and BabyMatt had "fun" last night.

HappyBanana by bricklyn April 1, 2010