when a guy is fisting a girl and then does sign language inside of her ass hole or pussy (what ever he is fisting).
"so, last night i was fisting my girlfreind and i gave her the Hellen Keller Down Under Bananza, it was tight!"
by bsteavs January 20, 2007
Get the Hellen Keller Down Under Bananzamug. A term used to describe ones mother impliying that they have a lot of pubes. Can be used as a come-back if someone says you have a mullet.
by Barry!!!! July 7, 2006
Get the Your Mums Got A Mullet Down Undermug. "Have a black belt under the Nogueira brothers" is a phrase used when something is being handed to somebody for free or when you recieve something you haven't earned. For example a toy in Happy Meal.
Yes, I bought this car. I won a lottery yesterday so I got myself a black belt under the Nogueira brothers. (have a black belt under the Nogueira brothers)
by magnum_opu5 September 24, 2018
Get the have a black belt under the Nogueira brothersmug. 
When you’re engaged in anal sex with a black BBW and she begins to twerk on your dick while still inside her.
Bro did that chick from the bar last night let you get a taste of the chocolate thunder from down under?
by Scotch Korean January 1, 2019
Get the Chocolate Thunder from Down Undermug. by olivia bensonola December 7, 2022
Get the Did you know that there's a tunnel under Ocean Blvdmug. 
Get the Whose Bed Have Your Boots Been Undermug.