Skeleton In The Cupboard Meaning To have a shameful secret hidden away Origin Until 1832 it was illegal to dissect a human body for the benefit of medical research, but of course many a physician still did, and the skeletons had to be hidden somewhere. It is also true that, after dissections became legal, grave robbers would dig up newly buried corpses and sell them to unscrupulous doctors in an underhand way. This practice was so frowned upon that medical men would try to keep their secrets hidden away in locked cupboards. The phrase was first used in print during an article in Punch magazine, written in 1845 by William Thackeray, and has been in common usage ever since .