[f. as prec. + -OUS.] Resembling the conduct of a filibuster.

1

1883.  St. James’s Gaz., 15 April, 3. It would be hard to say why that was a design less filibusterous than the occupation of New Guinea.

2

1890.  The Saturday Review, LXX. 19 July, 64/2. In a manner gallant but slightly filibusterous—the word deserves coining—he [Fremont] broke down the resistance of the Mexicans to the opening up of California.

3