Four-O 

1.The best place in the world
2.A great Party
3.Somewhere you go when you turn 40
4.An awesome person

1. I went to the Four-O of Four-O's

2.I went to a sweet Four-O

3. my wife turned 40 so we brought her to the Four-O

4. That dude is a Four-0

Four-O by yawayssysavayDVWJFBKJWAEGNRLKJ November 30, 2010

Four O'clock Freak-out

The four o'clock freak-out occurs on Sunday afternoons before the start of a week of college work. You suddenly realize that it is already four o'clock (the day is almost over!) and you have not done anything in preparation for the week ahead. Instead you have wasted the time you had to do work by surfing facebook, napping, and shopping. This catastrophe could be followed closely by the five o'clock freak-out, which sneaks up while you are wasting more time freaking out.

I spent Friday and Saturday having fun, with good intentions to study on Sunday. I slept in late, putzed around the house until I realized it was FOUR O'CLOCK and I still had to write three papers and put together a presentation, suddenly my stomach dropped, my heart started pounding, and I knew I was experiencing the Four O'clock Freak-out!

Four O'clock Freak-out by 1wildcatginger December 8, 2009

Four O'Clock Shuffle 

Is a word to describe grabbing the nearest person to you at the end of a night out when you have not got with anyone decent with the idea of having sex with them

Dude its nearly closing time the dj has just put on dont stop believing you better get a four o'clock shuffle quick!

Four O'Clock Shuffle by Crennaldo July 18, 2009

four o'clock 

tropical American plant having multicolored tubular flowers which its scientific name's Mirabilis jalapa.
they're in four colors;red,pink.white and yellow.

we have some four o'clock flowers in the yard.

four o'clock by nima goleij May 11, 2016

Uno Duo Three-O Four-O Five-O

A phrase that is common to Computer Science teachers. Typically the phrases that are emitted from the mouths of these teachers are mildly retarded and may be repeated more than ten times a day.

Mr. Biga - "Uno Duo Three-O Four-O Five-O!"
Student - "What the fuck?"

Uno Duo Three-O Four-O Five-O by Jacob Swift December 1, 2007

every puss has its four o'clock 

Islander slang. Describes how a tired and ragged look on someones face, that usually occurs around 4:00 pm.

Doctor: "how's the patient doing today?"
Aid: "Every puss has its 4 o'clock"

every puss has its four o'clock by Jeff Barouch June 23, 2004

the big four'o 

I would think that's a phrase used when someone turns forty (40) years old

Congratulations with the big four'O , He /she celebrated the big four'O

the big four'o by TheRealMotherFuckingBK May 10, 2016