When one drops acid at the least opportune time. Examples include: before attending a football game, before entering a warzone, before going to work, or during any other type of public mass event.

LSD, like any other strong hallucinogen, is not a drug to be taken in close proximity to large groups of people. The large amount of chatter and noise would create intense paranoia and fear in the user, and the person could very probably have a nervous breakdown.

This phrase is a play on words, originating from the movie Apocalypse Now. One of the main characters, a drug user, claims that he had been saving a tab of acid for a rainy day. Before entering a warzone, he claims that he had dropped the tab, and proceeds to act like somone who is tripping balls.
Hippie 1: Dude, I once dropped three tabs before I went to my class prom.
Hippie 2: Jesus! That must have been apocalypse acid!
by Penumbra Ninja guy February 19, 2007
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A party or gathering at which a large group of elderly people will get up and shuffle around under the guise of dancing.
"It was my gran's 80th birthday party last night. It was a fucking Zombie Apocalypse."
by John The Happy Black Man August 13, 2005
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LA based sex & music website that gives bitingly funny advice to retards who write into sex advice columns. Known for Lucidee's dark, blunt, no holds sense of humour about sex, musicians & guys she's dated. Awesome old school punk & rock n roll.

Often shortened to AP.
Apocalypse Pie is sex, rock n roll & retards, by an Aussie chick every dude with half a brain would kill to bang
by evep August 4, 2009
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The Zombie Apocalypse is a 'Prepper' term used to define the collapse of civilization where the living will hunt and harvest other human beings as a food source.
The Zombie Apocalypse depicted in the movie 'The Road' people were capturing other humans to eat reducing them to the walking dead.
by Sound Chaser November 1, 2018
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Something 12 year old boys wish would happen so they can show off how badass they are.
Sheldon: Imagine if there was a zombie apocalypse! I would use a gun!
John:Sheldon shut up you faggot
by jjr51802 November 2, 2013
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an explosion of fart made at the same time by several people, like ten to 40 people, in the same area
Newsman-a fart apocalypse happened today in Main Street of New York, New York inside a bus. Few lived, But most died of either exhaustion or the loudness. Sad day.fartexplosionflatulencebootydanger
by name mmmmmmmmmme June 21, 2010
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Apocalypse babies will be the resulting offspring off all the people who believe that the world will end in 2012 and have end of the world sex. For people who want to be with their loved one "one last time" or just a reason to get laid. And who needs protection when the world is going to end?

Or they have sex celebrating the fact that the world did not, in fact, end, and end up having babies anyways.
So this guy keeps trying to get into my pants saying that it's 'the end of the world'. Ain't no way I'm having his Apocalypse Baby!

Guy 1: Man chicks put out when they think they are going to die!
Guy 2: Careful man, your gonna have like 5 apocalypse babies!
Guy 1: Then let's hope the world actually ends, eh?
by Reedon September 30, 2010
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