11:59 

"a minute before midnight," means a person is so dark they almost look like the blackness of midnight.

I only date 11:59's so when we're doing it in the dark the only think I can see is their teeth.

11:59 by SuperMishelle March 13, 2009

11:59 p.m. 

A time used to avoid disambiguation of today/tomorrow when dealing with midnight.

Me: I need you to finish this before Friday 11:59 p.m.
You: Ok sure.
vs
Me: I need you to finish this before Friday Midnight
You: er, so hand it in on thursday or friday?
Me: ... Friday...
You: But Isn't midnight the first moment of the day?
Me: Shuddup.

11:59 p.m. by ryantheleach April 24, 2018

11:59 pm 

When every Google Classroom assignment is due. When you do your homework.

Due Dec 14, 11:59 PM

11:59 pm by Coolquaza2009 December 20, 2021

11:59 p.m. 

at the end of the day

At 11:59 p.m., we're all just squirrels looking for nuts.

11:59 p.m. by squeezy esq July 16, 2010

11:59 Challenge 

At 11:59pm in October 31st you start jerking off and try to finish before midnight.

If unsuccessful then you already failed No Nut November so you can just jerk off the entire month but if successful you can say you were the last person to jerk off and you got to have a moment of pleasure before 1 month without it

Chad: “Bro next year I’m totally gonna try the 11:59 challenge”
Chad Brad Bradley: “Yeah I did it this year and it was the best decision I made”

11:59 Challenge by Mooshrooms November 1, 2019

11:59:82747813PM Dec 31, 2020 

The current time right now.

person: hey did you know that it’s 11:59:82747813PM Dec 31, 2020?
person 2: it’s W H A T ? !

11:59:82747813PM Dec 31, 2020 by AmNow January 7, 2022

May 31st, 11:59 PM 

the moment before disaster, the moment before everyone you know and love will become gay, it is inevitable, fear it at all costs

its May 31st, 11:59 PM, goodbye everyone
*becomes gay*

May 31st, 11:59 PM by i have ligma pls help June 2, 2022