noun, masculine/filibusˈteɾo/plural: filibusteros
pirate, plunderer, freebooter
“El gobernador inglés de Jamaica concede patente de corso a los filibusteros, principalmente para que ataquen a las colonias españolas: atacan Costa Rica y Tobago.” — The English governor of Jamaica grants the plunderers letter of marque, mainly for them to attack Spanish colonies: they attack Costa Rica and Tobago.
Related: filibusterismo
Borrowed from French flibustier, from Dutch vrijbuiter.