Forty niner 

A woman who is a 4 but thinks she is a 9

Hey bro, look at this tinder thot forty niner requiring men be 6 feet tall, 6 figure income, looking like a model, and they are broke, far and aren’t even cute.

Forty niner by MGTOW September 10, 2019

Ground Point Niner

In aviation, "ground" control is always "121" in the first three digits of the frequency. In this case, Ground point niner would be "121.900".

Boston Tower: American 1070, cross runway four left and four right via Charlie, then contact ground point niner on the other side.

Ground Point Niner by BostonTower July 8, 2007

minor niner 

A term used by students in grades ten and up to describe grade nines, especially those that are new to the school.
Generally identifiable by the large packs they hang around in, the lost, confused and sometimes excited or amazed look on their faces and the constant asking of directions to their classes.
See freshman

Grade Nine Student *Lost look on face*: Wheres Rm 154?
Grade Eleven Student*Looks Annoyed*: Down the hall and to the left
Grade Nine Student * Smiles *: Thanks!
Grade Eleven Student *Rolls Eyes* Whatever.
*Turns to Friends* Minor Niners
*Friends Nod in Agreement*

minor niner by k e l l bell* September 4, 2006

Rusty Niner

A variation of the sixty-nine, except both participants are eating out the others balloon knot.

My girlfriend and I tried a Rusty Niner, but I didnt like the way her ass tasted.

Rusty Niner by Buzzzzzzz July 31, 2006

Nipty Niner

Precursor to the Sixty Niner (69). The Nipty Niner involves the couple sucking on each others nipples in the 69er position.

This works best if the male has larger titties than the female. It originated from couples with those unfortunate circumstances. However, lately this has become a big trend.

A - "Did you get lucky last night Bobby?"

Bobby - "You wont believe it, we started with a Nipty Niner and ended up doing a 69er. But you know what, i much prefer the Nipty Niner, it really get's me off and makes my nipples stiff. "

or

Man look at his titties, I bet all they do is nipty niners. His titties are so much bigger than hers. Lucky them, must be nice.

Nipty Niner by ChickenShrek February 2, 2022

Seventy niner 

Any individual born in the year 1979. Being born in 1979 makes a person infinitely more superior than any individual born in any other year. The only exception to this may be a sixty niner, someone born in 1969, but the jury is still out.

That guy Gerald I met the other day is pretty cool.

Of course he's cool, he's a seventy niner!

Seventy niner by BigHonky September 5, 2013

Ninety-Niner

A person who moved out to San Francisco during the Internet gold rush at the turn of the 21st century, roughly in the year 1999.

It is a play on the term "Forty-Niners," which refers to people who moved out to San Francisco during the gold rush around the year 1849.

Yes, I did come to San Francisco in August of 1999 to work for pets.com, but I find the term "ninety-niner" offensive.

Ninety-Niner by NYCDavid July 23, 2012