One-legged race 

The one-legged race is a highly active sexual position which involves the man lifting the woman off the floor and holding her against the wall with one leg raised holding one of her legs up and the other planted on the floor to provide the thrust. Can be painful if you overbalance at all.

i totally gave her a one-legged race last night, but f*cked my arm up when i fell over.

One-legged race by Rabamana September 15, 2010

One Night Standard 

A person who likes to have one night stands on weekends. Can work for both guys and girls, and usually involves sex with no strings attached.

Jess: "Where's Janie tonight?"
Anna: "She's out having a one night standard with a frat."

One Night Standard by Death's Door October 10, 2011

one-a-day 

to masturbate.

Can be used as a noun or verb.

Based on the results from the healthystrokes.com survey which reports the average man masturbates 7.2 times per week, or just about one-a-day.

"Sorry I took so long in the shower, I had to do my one-a-day"

"I just one-a-dayed all over the keyboard, anyone know how to clean that up?"

Jack: "Hey dude, why are you so whiny today?"
Jim: "I know, I'm so stressed out"
Jack: "Did you one-a-day yet?"
Jim: "Not yet! BRB ;)"

one-a-day by reddan69 February 9, 2012

one tree hill 

North Carolina's attempt to make the state well known by creating a crap-ass melodrama delivered by brooding chiseled teens and one good actress(Shame on you Moira Kelly, what about Cutting Edge?!).

Friend 1: Oh, fuckbeans...I missed One Tree Hill last night!

Friend 2: You sad little douche-rocket.

one tree hill by Call Me Yoshi May 14, 2004

One and Done 

When a man enters a woman and ejaculates immediately while screaming "SSSAAAVVAAGGGEEEE!!!"

Do it the Savage way One and Done!

One and Done by Spencer Savage January 5, 2012

one-eleven 

(v) to wipe your dirty ass with your index, middle and ring fingers in unison. Typically one does this when there is no toilet paper or suitable substitution available.

Steve one-elevened his messy hiney after realizing he ran out of Charmin.

one-eleven by Randman January 18, 2006

one time 

The start of every stupid story someone tells you.

"This one time...I...went...and climbed a tree"

one time by Rob April 18, 2005