@oristarA,
A filibuster, of course, is a long speech designed to prevent other business being done. It can be stopped by a vote of 60 out of the 100 senators, but if neither party has a 60% majority, the filibuster can be continued. In the US, the practice of a filibuster is limited to the Senate.
In practice, no one actually needs to conduct a filibuster. If the senator has enough votes on his side, that is enough to delay the action without a long and difficult speech. Strange, isn't it. Well, they do call the Senate the worlds most exclusive club.