Just as the Eskimos…

…are reputed to have a unique and extensive lexicon to describe snow, there's an apparent need for some new words to describe the range of dishonesty utilized by Bushco™. Shakespeare's Sister provides a useful addition…

Oathish: It’s kind of like truthiness, except it describes the congressional testimony of someone who isn’t put under oath, but promises he’d say the same thing either way.

The derivation is from the unsworn testimony of Attorney General Gonzalez, as in

Attorney General Alberto Gonzales’ testimony was oathish.

Of course, if the precise usage for a particular situation eludes you, you can always fall back on the tried and true. There's one thing you can always say about, well, pretty much anything any Republican says.

They just lie.

They do.