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When you're sure but don't know for a fact
I'm 99% sure that's not what he meant
99% sure by frabrizio December 17, 2017
Related Words
99% sure 99.9...% Sure 99 99-1 99 cent store 99% 99.9% .99 99 bananas 99-cent

99.9...% Sure 

Sometimes people, when expressing how certain they are of something, say they are 99% sure of something. Oftentimes, however, they choose to add validity to their statement by adding 9s behind the decimal place, thinking that will prove their words to be truth beyond belief. We can create a scale of how sure a person actually is based upon the numbers of 9s behind the decimal in their percentage:

99.9% sure: 99.9% is absolutely rock-solid; a person who says they are 99.9% sure of something is presenting insight with undoubtable knowledge of the topic. This information can be counted on.

99.99% sure: 99.99% is still measurably accurate. Usually, 99.99% is reserved for situations in which there still remains room for unexpected events. This information can still be counted on, but watch out.

99.999% sure: 99.999% represents the beginning of a slippery slope of doubt. 99.999% generally is used for opinions or statements that cannot be backed with empirical evidence. Most people who frequently express political beliefs will say they are 99.999% sure of something. Be careful before believing someone who is 99.999% of something.

99.9999% sure: At this point, we cannot be completely sure of how positive someone is of something. If a person says they are 99.9999% sure of something, it is basically a 50/50 situation.

99.99999% sure: If a person says they are 99.99999% sure of something, they genuinely have no fucking clue what they are talking about.
99.9...% Sure:

Connor: I am 99.9% sure that the sun will rise tomorrow.

Daniel: I am 99.99% sure that the next Battlefield game will be kickass.

Evan: I am 99.999% sure that Dirk is a homosexual.

Dirk: I am 99.9999% sure that Evan has been raped in the shower.

Johnny: I am 99.99999% positive that Socialism will prevail.

Rebecca: I am 99.999999% certain that I was a cow yesterday and will be again tomorrow.

Serial Monogamist 

Someone who jumps from one relationship immediately into another one.

Serial monogamists can not stand to be alone and often suffer from vast commitment and insecurity issues.

Because they jump into relationships immediately after the previous one has ended, serial monogamists typically don't take the time to reflect on their behavior or why their previous relationships failed; thus, they end up making the same relationship mistakes over and over again.
Person 1: Damn, Dustin already has a new girlfriend?! It's only been two weeks since he broke up with his fiance! I think he's a sociopath.

Person 2: No, he's a serial monogamist...
Word of the Day on June 22, 2026

liquid lunch 

A lunchbreak comprised entirely of alcoholic beverages, and no food.
"With all the lay-offs that morning, it was rough. I hit the bar around the corner for a liquid lunch mid-day."
liquid lunch by Alexandra July 27, 2004
Word of the Day on June 21, 2026
Dunzo, a slang word for done/finshed. Made famous by the Laguna Beach cast.
This car is so dunzo. (Kristin's car breaks down.)
dunzo by Joey Pellet December 8, 2004
Word of the Day on June 20, 2026

ankle biter

Someone or something that bites your ankles.
To a postman, an ankle biter is often known as a dog.
To an adult, an ankle biter may be a toddler.
To hikers, an ankle biter is sometimes a tick.
And so on.
"Dang ankle biter took off my whole leg!!"
ankle biter by the sane maniac February 2, 2004
Word of the Day on June 19, 2026