Definition - What does Filibuster mean?
A filibuster is when a member of a legislative body, such as the senate, makes an unusually long speech in order to attempt to prevent a certain thing from happening, such as a vote taking place or a bill being passed.
Justipedia explains Filibuster
Filibusters can last for many hours. Kentucky Senator Rand Paul made a filibuster that lasted for over 10 hours. However, the longest filibuster in American history lasted for over 24 hours.
Often, when a representative makes a filibuster, they are doing so because they strongly believe in their argument. Also, they may be concerned that if they stop the filibuster, then an action that is unfavorable to their position will be taken.