jargon.artrocity.com
New Hacker's Dictionary the Jargon File v 4.4.6
To go home. From the Unix C-shell and Korn-shell command cd ~, which takes one to one's $HOME (cd with no arguments happens to do the same thing). By extension, may be used with other arguments; thus, over an electronic chat link, cd ~coffee would mean “I'm going to the coffee machine.”