one-off 

A person you only plan to have sex with once. A one-night stand.

He's just a friend but he's cute enough that I would consider a one-off.

one-off by okaytoday May 2, 2006

one-off 

(n) a one time occurence. An ad-hoc exception to rule. Corporate jargon meaning that you'll do it once and not repeat.

Let's just treat this as a one-off and make sure it doesn't happen again.

one-off by tg28 November 8, 2006

One-Off 

A happening that occurs only once---not repeated---a unique event not seen before

The cheer leader's accepting a date with the chess champion was one-off for her ilk.

One-Off by pikeplacemarket June 18, 2009

one-off 

Chiefly British.

-adjective
1. one of a kind; unique.
2. done, made, or happening only once.
-noun
3. a one night stand.
4. something done, made, or happening only once.

This began as a British expression but is now known in the US and elsewhere.

Eddie: Say what?! You base-jumped off the Empire State Building? Were you insane?!

Johnny: Hey, it was only a one-off. I was a turk lad at the time and a little drunk, and I don't think I'd ever have the courage to do it again.

one-off by Raven Grace November 8, 2007

one-off 

short for One of a Kind

The one-off neon in Jinsoku is so tight, I wonder where he got the idea for that widebody!

one-off by scottyonapotty February 3, 2005

one off 

A quick (often anonymous) one time sexual act with another of the same or opposite sex which ends in climax.

Dude, I can't believe that had a one off with that cop to keep from getting a ticket.

Damn, you really had a one off with that hot soccer MILF behind the beer stand?

one off by Big NYC Jay June 24, 2008

one off 

1. To act quickly without much forethought.

2. To perform a task using as little effort as possible

Person 1: "Did you finish your report?"

Person 2: "Yeah, but I one off'd it. It's a C at best."

one off by Gamurman November 13, 2011