According to Merriam-Webster, the definition of FILIBUSTER  is:

1.  an irregular military adventurer; specifically an American engaged in fomenting insurrections in Latin America in the mid-19th Century

2.  a) the use of extreme dilatory tactics in an attempt to delay or prevent action, especially in a legislative assembly; b) an instance of this practice

Let’s use “filibuster” in a sentence:

The key to the filibuster is to continually hold the floor and refuse to yield it to anyone but your supporters.