For most people outside the US, the word filibuster (flibustier on the French coasts) might only raise some vague memories about scary-looking bad guys roaming the seas in order to loot, rape and sink whatever they get their hook on (no, not talking about Dick Cheney and Haliburton here). In US political legalese, however, it carries a very different meaning.
You better get acquainted with it, as you are likely to hear more of it, provided the Democrat senators get some of their spine back by then.
It is also the only legal barrier that stands between the 48% somewhat sane Americans and their newly elected Emperor’s theocratic vision for America.
To do very, very short:
A filibuster is a way for the minority party to oppose a law that’s being debated in the Senate and that would otherwise easily receive the necessary majority vote, by methodically obstructing the debate and hogging speaking privileges.
Senate rules state that every senator is entitled to two speeches of unlimited duration regarding the matter at hand. Further more, only a tiny fractions of such speeches (3 hours per session, to be precise) is required to be germane (somewhat relevant to the matter at hand), the rest can be about anything, and I do mean, anything (see below).