the Higgs is a catchphrase for a number of different mechanisms that attempt to understand something we do not yet understand
the electron weighs this, the proton weighs that, the lambda hyperon weighs something else. there are hundreds of particles, and over and over, we see that they each have a very specific mass in numerous independent experiments.
but *why* do these particles have the masses that they have?
what physics helps us understand why the electron weighs 0.511 MeV/c^2, and not some other value?
the Higgs mechanism is a possibile theoretical explanation for this.
one way to determine if this makes sense is to "see" the Higgs Boson. FNAL has been looking *hard* for this for years and it's one of the major goals of the LHC.
to get a very basic idea, take a look at this
http://www.pparc.ac.uk/ps/bbs/bbs_mass_hm.asp
this is the most common analogy. for more details see
http://en.wikipedia.org/wiki/Higgs_mechanism
FNAL has a shot to upstage the LHC, but they'll need to run flat out for at least a couple more years to get a discovery level signal (assuming the present constraints on the Higgs mass are correct). FNAL might not be funded for that - funding is a year-to-year thing.
go FNAL go!
cheers
edit: hey Ms. Bekki - the higgs mass is most likely not that large - it seems very likely at this point that it is less than the top (~175 GeV). i think the difficulty in isolating it has more to do w/ the cross-sections/branching fractions etc etc....
cheers