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."