Definitions from Wiktionary ( )

▸ noun:  A mercenary soldier; a freebooter; specifically, a mercenary who travelled illegally in an organized group from the United States to a country in Central America or the Spanish West Indies in the mid-19th century seeking economic and political benefits through armed force.
▸ noun:  (US politics) A tactic (such as giving long, often irrelevant speeches) employed to delay the proceedings of, or the making of a decision by, a legislative body, particularly the United States Senate.
▸ noun:  (US politics) A member of a legislative body causing such an obstruction; a filibusterer.
▸ verb:  To take part in a private military action in a foreign country.
▸ verb:  (originally and mainly US, politics) To use obstructionist tactics in a legislative body.

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