The esteemed half-term Governor Sarah Palin(R-Pluto) developed this neologism as a means to
demonstrate her unparalleled capacity for steadfast denial of fact and truth.
Refudiate comes from the root "repudiate," and when combined Palin's all-american bravado and insistence that she's right even when she's wrong, a new word is added to the national lexicon.
Common "repudiate" meanings:
Refuse to accept or be
associated with
Deny the truth or validity of
Palin "refudiate" meanings:
Refuse to accept or be
associated with anything that doesn't serve my political agenda.
Deny the truth or validity of ANYTHING at my discretion, ESPECIALLY when it is actually true.
In summary, "refudiate" generally means: to deny and disassociate oneself from the truth at all costs.