.99 

The correct length a guy should spend staring at a girls (usually large) boobs. Satring longer than .99 seconds time will make you look like a stalker or just some creepy guy.

I was at the gym and saw a fine hunny on the treadmill, I gave the .99 and before turning back around.

.99 by gt_rama February 4, 2006

.99 

Another way of say tight, sweet, and wicked awesome. Deriving from the word cool, .99 has become a popular word among high school students on the west coast of the United States

Man that ride is so .99!
you look really .99 man!
That guitar riff was totally .99!
you're really .99!

.99 by Aaron and Michelle March 22, 2009

99 

Cuddling

Boy: Since 69 is a sex position, does it mean 99 is cuddling?

Girl: ...
Boy: do you wanna 99?
Girl : Seriously? Yeah sure, why not?

99 by Aeia_mnstr April 10, 2020

99 

A reference to cuddling or spooning. Each 9 represents a person, and the rest can be seen.

It's basically 69, but wholesome

K: I wanna 99

M: What?

K: I'm little spoon ^_^

M: wha... ohhh, okay :)

99 by akuwardmoments January 21, 2020

99 

When you're really close to something/someone but you don't make it.

I tried asking this girl out but I 99'd because she changed her mind.

99 by Diptych July 7, 2016

99% 

Almost all but not quite. Generally doesn't actually represent a statistical 99%.
Used to make it seem like there's an extremely small chance that what you say is wrong, when in reality it may be as large or larger.

Example / (Translation)
I'm 99% sure / (I have no fucking idea)
Our hand sanitizer kills 99% of germs / (It kills a few germs)

99% by Rickton January 17, 2005

99 

99 = Nighty-night! Usually used when it's late into the night btw =3

you: OMG, it's 3AM already and we're still online...
me: ya, we should probably off to bed...=.=
you: k, 99
me: 99 =3

99 by Dawei Lu April 6, 2008