Top definition
Commonly denoted scientific way of describing a male's sex chromosomes.
Males are X&Y,
Females are XX
and there's all kinds of other crap in between
by DogE March 06, 2006
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Jul 15 Word of the Day
The safeguarding of Earth and other worlds from biological cross-contamination (i.e. billionaires with too much time on their hands).

Also known as “planetary protection.” Planetary protection / quarantine “reflects both the unknown nature of the space environment and the desire of the scientific community to preserve the pristine nature of celestial bodies until they can be studied in detail.”

There are two types of interplanetary contamination. Forward contamination is the transfer of viable organisms from Earth to another celestial body. Back contamination is the transfer of extraterrestrial organisms, if such exist, back to the Earth's biosphere.
Billionaires are having a dick swinging space race while the earth experiences record breaking heatwaves that cause sea creatures to literally cook inside their shells. We need planetary quarantine.
by monkeylabor July 14, 2021
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2
Best Coldplay Cd to date!
X&Y is better than any coldplay cd.

"..Well thats where I belong and you belong with me, like swallowed in the sea.." - 11. Swallowed in the Sea. X&Y
by Coldplay Rocks June 21, 2005
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3
The name of Coldplay's forthcoming album, which will undoubtedly be massive.
'X & Y' - a combination of oldplay and boldplay
by max May 16, 2005
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4
The eagerly-anticipated third studio album by the (in my opinion) greatest band ever, Coldplay. The first single "Speed of Sound" will be released on May 23rd, 2005, while the album itself drops on June 6th, 2005.
I'm planning on camping out outside of Fred's Record's on June 6th to get X&Y.
by strong badian April 11, 2005
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5
Another way of saying Shite, boring, wanky, bollock ridden, cunt flap of a toe nail chewing monkey cum dribble of an album!
Chico's album is X&Y
by Laurence joseph May 03, 2006
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