Shaving the asshairs after a diarrhea so you don't have to wipe all the disgusting shit in your asshole
I just did a Chocolate Thunder from Down Under!
by Homeboyyyyy69 August 1, 2020
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When your fucking a chick in her pussy and you fart so hard that she feels the vibration of the fart off the head of your dick
I was fucking this chick last night and gave her a dirty thunder from down under , she felt it and laughed
by Dr. Pain April 15, 2020
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A way to express some down under love.

The way you do it, is you point both of your thumbs down, then slowly point them out and shout "TWO DOWN UNDER....THUMBS UP!"

Only Ozzy's will (most likely) get this joke.
As we we're leaving Outback Australian steakhouse, i told the waitress "I give this place Two down under...Thumbs up."

The very American waitress gave me a look, for she did not understand down under humor.
by Xx_iNsPeCtOr-sCoObY_xX December 30, 2011
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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 19, 2007
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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.
Example

Alexis: You've got A mullet.

Akira: No mate, your mums got a mullet down under.
by Barry!!!! June 24, 2006
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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
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When a male recieves oral stimulation under water, and exspells a fecal bumble that floats up the gooch and into the accomplice's mouth.
man last night my girlfriend puked in the hot tub. i got her in the mouth with my bush thunder from down under.
by en1gma November 30, 2008
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