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1.
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
 
2.
The only word anyone knows that begins in 'x'.
"X is for...um...xylophone,..yeah that's it".
by Evan May May 31, 2005
 
3.
A melodic percussion instrument made of resonators and wooden keys with a chromatic scale. Mallets are used to strike the keys.
The Nazareth Blue Eagle marching band has rockin Xylophone players!
by kreeta March 31, 2004
 
4.
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
 
5.
Grab your dick and play the Xylophone on her ribs.
You: Let me see your ribs
Girl: Kay one sec
You: Imma give you a Xylophone
Girl: Okay
You: "Whack her ribs with your dick"
by Joe Joe BoB June 05, 2009
 
6.
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
 
7.
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