A slang term used in the fashion and entertainment industry (and often in the pro-ana community) to describe visible chest bones in a female due to extreme thinness. Not used with regard to the side of the body but specifically the breastplate due to its xylophonic appearance. Synonymous with xylobone.
"I was trying to focus on the clothes during that fashion show, but I kept getting distracted by those xylophones."

"Whoa, girl, you losing weight? I see some xylophone!"

"Victoria Beckham rocks her xylophone in those red carpet pictures."
by NatashaSP November 27, 2008
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The only word anyone knows that begins in 'x'.
"X is for...um...xylophone,..yeah that's it".
by Evan May May 31, 2005
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A slang term used within the pro-ana community to describe the visibility of a female's chest / sternum bones due to extreme thinness.

Interchangeable with "xylobone."
"That low-cut dress really shows off your xylophone."

"That model was so skinny, all I could look at was her xylophone."
by NatashaSP October 10, 2008
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To move along a line of naked women who are all bending down, and spank their bottoms - which are of varying sizes - with one’s penis; to play a tune on women's buttocks. From the Greek xylo meaning ‘wood’ and phonnicus meaning ‘to hit tunefully’
by Martin Duxon August 08, 2003
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A word used to confuse little children in the spelling of it, although spelling such a word is extremely easy.
<KindyGartener> Zila-what?
by Bastardized Bottomburp May 04, 2003
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This action consits of a line of naked women in a bent over position. Xylophoning is the action of runing while inserting and removing the penis from the begging of the line and going to the end of the line of women. This action is repeated multiple times until ejaculation occurs. The Xylophone is a fun way to mix up group sex.
Man, did you see those girls that Jacob had The Xylophone with last night, they were smokin hot.
by A Town June 01, 2007
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when a male gets an erection while listening to, playing, or just in the presence of a xylophone
When rizwan was playing the xylophone, Alan walked in naked and rizwan got a xylophoner
by TheGrandWizardFromAlabama February 25, 2012
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