STRESS PUPPY: A person who seems to thrive on being stressed out and whiny.
TOURISTS: People who take training classes just to get a vacation from their jobs.
TREEWARE: Hacker slang for documentation or other printed material.
UMFRIEND: A personal relation of dubious standing or a concealed intimate relationship, as in "This is Dylan, my ... um ... friend."
UNINSTALLED: Euphemism for being fired. Heard on the voice-mail of a vice president at a downsizing computer firm: "You have reached the number of an Uninstalled Vice President. Please dial our main number and ask the operator for assistance. *(Syn: decruitment.)
XEROX SUBSIDY: Euphemism for swiping free photocopies from one's workplace.
YUPPIE FOOD STAMPS: The ubiquitous $20 bills spewed out of ATMs everywhere. Often used when trying to split the bill after lunch, "We each owe $8, but all anybody's got are yuppie food stamps."
404: Someone who's clueless. From the World Wide Web error message "404 Not Found," meaning that the requested document could not be located. "Don't bother asking him; He's 404, man."