Do you really want to send Jargon a message saying you like their work?
fum n.
[XEROX PARC] At PARC, often the third of the standard metasyntactic variables (after foo and bar). Competes with baz, which is more common outside PARC.
--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.