The theory that history and culture (i.e. fashion, music etc.) repeats itself every couple of decades.

Its plausibility draws from the fact that most parents raise their children with the same ideas that their own parents asserted upon them.
There are many similarities between the war in Iraq today and the Vietnam war .. It's almost like a retrograde revolution.

Hopefully, a retrograde revolution involving the 60s and 70s will begin, and groups will actually start playing some real music.

The comeback of blazers is part of the retrograde revolution.
by Isabella June 2, 2005
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A three week period in which the planet Mercury to appears to be in backwards motion.

during this time human beings experience many adverse effects, such as memory loss, loss of time, loss of items, loss of virginity, loss of common sense. As for technology many unexpected glitches occur during this time, such as software crashes and emails getting lost

2000 November - Bush-Gore election
2006 July - Zidane head butts Materatzi in World Cup final
2006 July - Israel / Hezbollah brew ha ha
2006 July - Software companies experiences unforseen glitches
I can't believe Zidane headbutted that I-talian guy in such an important game, must be mercury retrograde

smart guy: Hey guys its August, we all made it through Mercury Retrograde without any glitches

co-workers: uhhh its July still.

smart guy: God damn it, MERCURY RETROGRADE
by justapaperbag July 26, 2006
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A condition found in a small number of diabetic men who, upon climax, ejaculate into their bladder.
"John, a 42-year-old diabetic, has difficulties fathering children, as he suffers from retrograde ejaculation."
by Typhon December 7, 2004
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Mercury retrograde is the act of taking a shit whilst mooning one or more human beings. Your day can typically being going well, according to your horoscope, until you are forced into witnessing Mercury retrograde. Performing Mercury retrograde will often speed the astrological cycle forward for the individual performing the Mercury retrograde, bringing about happy and fruitful times to come.
As the sun sank down over the pier, the children fishing gazed in horror as the lard-ass on his flat bottom boat sent the lakeshore into Mercury retrograde.
by BatWingg May 17, 2021
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Mercury retrograde is the act of taking a shit whilst moaning one or more human beings' names. Your day can typically being going well, according to your horoscope, until you are forced into witnessing Mercury retrograde. Performing Mercury retrograde will often speed the astrological cycle forward for the individual performing the Mercury retrograde, bringing about happy, fruitful, and beneficial times to come
As the sun sank down over the pier, the children who were out fishing gazed in horror as the lord lard-ass on his flat bottom boat sent the lakeshore into his own mercury retrograde
by ♥🗺☠ June 4, 2021
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A woman is acting strangely because she is menstruating. It is believed in astrology that Mercury being in retrograde motion cause people, particularly women, to behave oddly.
Hey Greg, Sarah is bonkers today. Is Mercury in retrograde?
by Jezzmund April 27, 2017
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A special time in the universe when, everything that can, will go Right.
After I found my lost class ring, and the Prize Patrol knocked on my door, I knew that was, Murphy in Retrograde.
by Chefspam March 20, 2015
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