24 Hour Drinking Challenge 

Originating in Newfoundland and Labrador, Canada's drunkest province. To complete this challenge you must stay up all day and night and continue drinking for the entire 24 hours without falling asleep. If you fall asleep you lose the challenge and the respect of your friends.

Me and da bys are going to our buddies shed for the 24 Hour Drinking Challenge

24 Hour Drinking Challenge by Steeemo June 14, 2016

the bitching hour 

The bitching hour is when the parental unit comes down en masse with criticisms of your habitual failures, laziness, and poor grades.

The reports come out today. It's time for the bitching hour.

the bitching hour by Cranberry Bob January 17, 2020

Rush Hour Rambo 

A vigilante who tries to save people on public transport.

During emergency on subway.

Cop: Okay, People! Stay calm, we don't want any 'Rush Hour Rambos'!

Rush Hour Rambo by MaddaCheeb24 October 7, 2009

6 Hour Challenge 

When one tries to go a full day of school without having to use the public bathrooms. This results in feeling uncomfortable and very irritable for the duration of the day.

Guy 1: I was in a rush this morning and couldn't take a crap.
Guy 2: Looks like you're taking the 6 hour challenge

6 Hour Challenge by mbrands95 March 6, 2011

11th hour 

the last possible time at which we can change for the better and correct our faults;The last moment when change is possible.(relates to the the many environmental problems facing humanity)

we have to change before the 11th hour, because by then it will be to late.. environment

11th hour by joshy pooooo October 1, 2008

Ungodly hour 

If you refer to a time as an ungodly hour, you are emphasizing that it is very early in the morning.

Still up at this ungodly hour. So sleepy but I can't sleep :(

Ungodly hour by palemisfits January 4, 2014

H-Hour 

A redundancy in military jargon signifying the exact hour for an operation to begin. Big "H" for "big hour".

The invasion of the enemy held island began at H-Hour, 05:00.

H-Hour by Joe Rodolico February 10, 2007