The Jargon File (version 4.4.7, 29 Dec 2003):

bogosity
 /boh?go's@?tee/, n.

    1. [orig. CMU, now very common] The degree to which something is bogus.
    Bogosity is measured with a bogometer; in a seminar, when a speaker says
    something bogus, a listener might raise his hand and say ?My bogometer just
    triggered?. More extremely, ?You just pinned my bogometer? means you just
    said or did something so outrageously bogus that it is off the scale,
    pinning the bogometer needle at the highest possible reading (one might
    also say ?You just redlined my bogometer?). The agreed-upon unit of
    bogosity is the microLenat.

    2. The potential field generated by a bogon flux; see quantum
    bogodynamics. See also bogon flux, bogon filter, bogus.


The Free On-line Dictionary of Computing (30 December 2018):

bogosity

   /boh-go's*-tee/ The degree to which something is "bogus" in
   the hackish sense of "bad".  At CMU, bogosity is measured with
   a bogometer; in a seminar, when a speaker says something
   bogus, a listener might raise his hand and say "My bogometer
   just triggered".  More extremely, "You just pinned my
   bogometer" means you just said or did something so
   outrageously bogus that it is off the scale, pinning the
   bogometer needle at the highest possible reading (one might
   also say "You just redlined my bogometer").  The agreed-upon
   unit of bogosity is the microLenat.

   Also, the potential field generated by a bogon flux; see
   quantum bogodynamics.  See also bogon flux, bogon
   filter.

   (2002-04-14)