[f. as prec. + -OUS.] Resembling the conduct of a filibuster.
1883. St. Jamess Gaz., 15 April, 3. It would be hard to say why that was a design less filibusterous than the occupation of New Guinea.
1890. The Saturday Review, LXX. 19 July, 64/2. In a manner gallant but slightly filibusterousthe word deserves coininghe [Fremont] broke down the resistance of the Mexicans to the opening up of California.