The Jargon File

A Chronology...The Jargon FileComputer Dictionary
FINE
(WPI) adj. Good, but not good enough to be CUSPY. [The word FINE is used elsewhere, of course, but without the implicit comparison to the higher level implied by CUSPY.]
FLAG DAY
[from a bit of Multics history involving a change in the ASCII character set originally scheduled for June 14, 1966] n. A software change which is neither forward nor backward compatible, and which is costly to make and costly to revert. "Can we install that without causing a flag day for all users?"
FLAKEY
adj. Subject to frequent lossages. See LOSSAGE.
FLAME
v. To speak incessantly and/or rabidly on some relatively uninteresting subject or with a patently ridiculous attitude. FLAME ON: v. To continue to flame. See RAVE. This punning reference to Marvel comics' Human Torch has been lost as recent usage completes the circle: "Flame on" now usually means "beginning of flame".
FLAP
v. To unload a DECtape (so it goes flap, flap, flap...). Old hackers at MIT tell of the days when the disk was device 0 and microtapes were 1, 2,... and attempting to flap device 0 would instead start a motor banging inside a cabinet near the disk!
FLAVOR
n.1.Variety, type, kind. "DDT commands come in two flavors." See VANILLA.
2.The attribute of causing something to be FLAVORFUL. "This convention yields additional flavor by allowing one to..."
3. On the LispMachine, an object-oriented programming system ("flavors"); each class of object is a flavor.
FLAVORFUL
adj. Aesthetically pleasing. See RANDOM and LOSING for antonyms. See also the entry for TASTE.
FLUSH
v.1.To delete something, usually superfluous. "All that nonsense has been flushed." Standard ITS terminology for aborting an output operation.
2. To leave at the end of a day's work (as opposed to leaving for a meal). "I'm going to flush now." "Time to flush."
3. To exclude someone from an activity.
FOO
1.[from Yiddish "feh" or the Anglo-Saxon "fooey!"] interj. Term of disgust.
2. [from FUBAR (Fucked Up Beyond All Recognition), from WWII, often seen as FOOBAR] Name used for temporary programs, or samples of three-letter names. Other similar words are BAR, BAZ (Stanford corruption of BAR), and rarely RAG. These have been used in Pogo as well.
3. Used very generally as a sample name for absolutely anything. The old `Smokey Stover' comic strips often included the word FOO, in particular on license plates of cars. MOBY FOO: See MOBY.
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