one and done 

a long-term monogamous relationship between husband and wife, in which one man and one woman, never previously married, wed and stay wedded until the day they die, come hell, high water, or anything in between. Also, an extreme commitment between husband and wife. See LDS Temple Marriage for more information.

Tim: "Dani, I'm so glad we've decided to be "one and done," so that we can stay committed to each other for the rest of our lives.

Dani: "That's right, Tim. We will never get a divorce, so long as we both shall live. In fact, according to LDS doctrine, we will stay married even after we die, and become gods and goddesses!"
Tim: "One and done, you've saved our marriage!"

one and done by daniellamarcella March 25, 2011

one nut

The result of a fight with a switch knife, or the ex- after revenge.

dizeh has 1 nut

one nut by ads0r September 11, 2003

one ten

The rating of a girl on a scale of one to ten, usually occuring as she passes by two guys.

Ratings usually mean the following:
>8 I'd do her, even if it meant first taking it in the ass from her using a strap-on.
6-7 I'd do her if she didn't expect me to go down on her.
5 I'd do her if I was entoxicated.
4 I'd do her if no one ever found out.
3-2 I'd do her in total darkness.
1 Reserved for animals and mutants. Below threshold of normal horniness. Barely.

Dude 1: Holy shit dude?! Look at that fine biatch! What's your one ten?

Dude 2: Um dude, that's your step mom.

Dude 1: Oh yeah...my bad. I mean I'd still hook up with her if I got the chance... she's definately an 8.5 any day of the week!

Dude 2: You are so fucked up dude. She's a 6.3 at best.

one ten by Pfill Chong September 25, 2006

One-Time 

To "One-Time" someone is to hit them harshly and K.O them in one hit (as the name suggests)

"I'm gonna One-Time you on Halo 2 with my auto-headshot sniper rifle"

"You got One-Timed last night mate!"

One-Time by Evilragdoll666 October 31, 2006

one eyed monster 

when you moon someone with ur buttcheeks stretched appart so that your victim stares right into the hole or "eye". if two people do it its a two eyed monster, if three, its a 3 eyed monster, so on...

also it could mean a penis

he gave me a one eyed monster yesterday, lets give him a 3-eyed monster tonight to get him back

one eyed monster by Flump August 21, 2006

One Direction

Five flaming homosexuals that have millions of girls fall in love when them everyday. If you join the fandom, it is nearly impossible to leave it. You are usually constantly talking about them once you're a directioner.

Me; I'm in love with One Direction.
Friend; I know, you never stop talking about them.

One Direction by Kayla Whoran November 14, 2012

One In A Million 

A term used to describe a moment where someone does something beyond idiotic. The term is used because it describes the fact that only one sperm out of a million reaches the egg and the fact that this person's sperm just happened to be the one that fertilized it. ie: "One in a million, and you were the one who got in"

Friend decides its a good idea to jump on a trampoline while on a skateboard, then proceeds to slip off and break his leg and arm.

Me: One in a million dude, one in a million.

One In A Million by One In A Million #1 January 11, 2009