The first hour of a exam session after which students are allowed to leave the examination hall.

Derived from the mullet-descriptor 'business in the front, party in the back', the stage where a man's hair is too long in the back to be considered acceptable or uniform with the rest of the hair, and too short to be considered a mullet.

Between the hours of 0800 and 0900 on ship, the ship's XO forces everyone to clean, sand and paint the ship's pways despite the fact that the ship is 20-30 years old and broken down; this time of ridiculousness is what is called happy hour. Most military members rock out to tunes of their choosing during happy hour because alcoholic beverages and prescription drugs are not available, and it is hard to endure cleaning the same shit every fucking day. Some ship XOs go so far as to host, "happy hour competitions," to rouse military members to compete against one another, despite the fact that when you do the same thing everyday it is technically not a competition, you fucktard.

The Time When You Masturbate.

when you imbibe great quantities of depressants

When you get two girls in Sousa Domincan Republic instead of one. Threesome

Unrelated to the 'cheap drinks' definition, Happy Hour is a card game that can be highly amusing under the right conditions. It is usually played with a single deck, though multiple decks can be used. Any number of players can participate, and generally the more the better. The game begins with the deck being evenly divided among the players. The object of the game is to get all the cards.

That's it. No other rules.