The infamous tumblr crash of December 12, 2012, is the day when tumblr was down for hours with no warning. Lots of "MY FEELS" and "ALKAFELFJAFJEWLAKJKA" resulted from this. People believe this is really the end of the world, because it happened on a triple date. Some also think that it was also another social experiment conducted by Cole Sprouse.
Sometime in the near future:

-Hey Liz, what are you doing?
-Nothing. I think there might be another tumblr crash of 12/12/12 going on. What will I do with my life? MY FEELS.
by EZBothwell December 13, 2012
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When you miss 11:11 and you gotta bounce on some dick at 12:12
Damn missed 11:11 gotta bounce on some dick at 12:12
by Dadasouras January 27, 2019
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A time where u post on ur Snapchat of the people u don’t like
Person1: bro that one guy is my 12:12

Person2: oh for real
by Snapchat things April 19, 2019
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What seems like a good day, 12/12 is about any day that is the turning point of someone's life, but not in a good way. It normally involves a loss in a lot of valuable items that may not cost a whole lot, but to the individual, priceless.
Jack lost all his weed on 12/12
by Jack Lay December 22, 2006
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1. They day the world will end , according to the Mayan Calender.
2. The day anyone born on 12/12/1996 should have their sweet 16, for anyone born on that day will turn 16 on that day.
3. The worst sweet 16 ever!
A man I'm gonna die on 12/12/2012 , my sweet 16!
by bagels1212 November 23, 2010
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Better known by his other stage name Tony Yayo.

(Also Mr. 12/12 58/58, Mr. 12 12 58 58 etc.)
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Tony Yayo, born in Southside Jamaica Queens in 1977, is part of the rap group G-Unit. Even if you don't know him, you'v seen him makin hype on every 50 Cent's show. He has got a lot of haters, but obviously - he doesn't care.

Tony Yayo released one official album - Thoughts of a Predicate Felon (August 30, 2005, G-Unit Interscope). Now he's back on the street level, producing or hosting hot mixtapes. Recommended: S.O.D.(Swimmies on deck) and Black Friday.

Tony Yayo (born as Marvin Bernard) gave himself his stage name Mr. 12 12 58 58 after his drug dealer nick name, referring to his past.
Same with "Tony Yayo" - Tony - T.O.N.Y. = Talk Of New York, "Yayo" = cocaine, crack - the drug Tony was specialized on. Phrase YAYO got popular especially after spectacular movie The Scarface.

"Aww nigga do you know what this is
One shot one kill whats the deal G-UNIT!
Aww nigga do you know who you with
It's Tony Yayo up in this bitch!"

Tony Yayo - So Seductive

"Ya'll niggas can't rap ya'll ain't got no money
Broke ass niggas
Its the real Talk Of New York
Niggas tryin to bite my name and shit while I'm gone ha ha
Top Of New York nigga I'm changin' my shit, a.k.a. 12 12's 58 58's nigga
I did that just cause the playoffs is right now
You bumass niggas"

Tony Yayo aka Mr. 12 12, 58 58 - NYC, Where I'm From
by Heartless_monster January 20, 2009
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