Twisty Nine 

A variation of the 69 position. The practitioners lay down; head to toe; back to back. The participants then twist their backs around at the waist. Each of the participants' heads are now facing the butt of the opposite person. Oral to anal sex ensues.

Connor: Oh hey Nick, how was your weekend?

Nick: It was great, I totally pulled a twisty nine on this chick!

Connor: Woah dude you're flexible!

Twisty Nine by Krindy-Applesauce van de Merwe July 6, 2010

Back Nine 

The backside of a female.

Bro, did you see the that girl that just went by.

Hell yes, that lady had a fine back nine.

Back Nine by sanfred January 20, 2011

Ninety-Nine Percent

Something that is entirely ideal, but just not quite perfect.

Dude A: Man, she's like Ninety-Nine Percent my dream girl.

Dude B: So if you met your dream girl you'd just dump her instantly?

Later...

Dude B: This soda is like Ninety-Nine Percent my dream soda.

Dude A: You're just jealous.

Ninety-Nine Percent by THE MAN GABE HIMSELF April 10, 2010

all nine gallons 

the act of a person blowing off his load and splurging out all nine gallons

josh had went all nine gallons on that hoe

all nine gallons by wooderman123 February 14, 2017

raging nine year old 

A little piece a garbage that constantly screams into his mic and usually plays minecraft or call of duty black opps 3, also someone that older gamers troll to make viewers laugh.

Troller: *makes kid fall in lava on minecraft*
Raging nine year old: *earsplitting scream*

raging nine year old by DerpyCheezit September 20, 2017

Desert Nine 

A desert nine is when someone has a mask over half their face, so you can not tell if the person is physically attractive or not. Only when the mask is taken off can you judge the individuals pure beauty.

Brian: Yo is that new girl Stacy in your group for Econ?
Steve: Yeah can’t tell if she’s hot or not, she’s a desert nine.

Desert Nine by Michael2323 April 13, 2022

Feety Nine 

when two partners arrange their bodies to perform any type of foot play on one another at the same time

Hey B, we’ve been walking all day and we both need a foot rub. Tryna Feety Nine?

Feety Nine by Himothy P-Hill July 26, 2022