(From mathematical jargon) An expression used ironically to characterise unquantifiable behaviour that differs from expected OR required behaviour. FOR example, suppose a newly created program came up with a cORrect full-screen display, and one publicly exclaimed: "It wORks!" Then, if the program dumped cORe on the first mouse click, one might add: "Well, fOR suitably small values of `wORks' ." Compare the characterisation of pi under fOR values of. [Jargon File] (1997-09-21)