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

The best answer to literally anything

When someone is Almost telling the whole truth.. You call them out on not keeping it #100...
As in-
Leaving out crucial details of a true story.. Making it almost"too good to be true".
Not being 100% honest.
((Like saying "sounds good" in a mocking tone..as if almost in disbelief..))

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

Used in reference to homosexual sex. A play on the usually heterosexual 69 position, where the numerals represent the position of the sexual partners.

In England '99' chiefly is associated with a popular type of ice-cream sold by ice-cream vans that are usually seen in seaside resorts.

Putting your age as 99 on Myspace so that people can't troll you by your real age and spam you or send you stupid messages like "whazzup?"

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

It's basically 69, but wholesome