When the penis is inserted into the anal pasage of another(usually male but...) and when it is pulled out there is some shit remaining on the cock, it is said to have a chocolate bananna.
"Dude, last night I was fucking my wife up the ass, and when i pulled out, I had a chocolate bananna."
by Old Pedro October 18, 2006
Pushing a bananna up a girls rear and proceeding to have anal sex with her. The force of sex will turn the bananna into a cream that, once you are done having sex with her, will drip from her ass resembling a chocolate bananna milkshake.
Damn man i gave a girl a chocolate bananna milkshake last night and the bananna in her ass really added to the fun!
by cr8zyazn September 29, 2010