The O'Kelley Fifteen 

An unintentionally long fifteen minute break taken at your place of employment.

"I started checking my email on break, and before I knew it I had taken The O'Kelley Fifteen."

The O'Kelley Fifteen by salgoldberg January 6, 2010

Fab Fifteen (Noun)

no need to define.. you knowwwwwwwww

Lime green tee's ; green means envy

Fab Fifteen (Noun) by fabmember April 16, 2005

Fifteen will get you twenty 

15 will get you 20

Fifteen will get you twenty by David October 31, 2003

fifteen 

v. the act of coitus (slang)

beavis: i think i like her.
butthead: did you bust a fifteen?

fifteen by slithering November 30, 2004

Down with fifteen 

a person who is "down with fifteen" is a person who likes to get with fifteen dicks at the same time. for instance, if a person jacks you or pins you out in some way, then they're "down with fifteen"

that bitch is so down with fifteen. he fuckin banged my woman.

cops are so down with fifteen

Down with fifteen by Mr. Slippyfists March 7, 2008

Fab Fifteen 

A group of girls that Michael Pesce and David Nierenberg are obsessed with. They wish they could join the Fab because they are the top two guys that are usually always hanging out with these extraordinary group of girls.

\"Yes, it\'s true we did make up the fake Mike Stackpole entry, but only because we adore you guys!\"

Fab Fifteen by a fab member April 26, 2005

Fifteen-and-a-half 

The age that a girl is often most sexually appealing, but is 6 months too young to legally engage in intercourse (in Britain)

"She was fifteen-and-a-half, I mean what's six months? And she looked a lot older in that basque."

Fifteen-and-a-half by Andy Tiger May 29, 2005