flap
= F =
flash crowd
flarp /flarp/ n.
[Rutgers University] Yet another
metasyntactic variable (see foo). Among those who use
it, it is associated with a legend that any program not containing
the word `flarp' somewhere will not work. The legend is
discreetly silent on the reliability of programs which do
contain the magic word.
--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.