fil ‧ i ‧ bus ‧ ter /ˈfɪləbʌstə, ˈfɪlɪbʌstə $ -ər/ BrE AmE verb [intransitive and transitive]
[ Date: 1800-1900 ; Language: Spanish ; Origin: filibustero 'pirate' ]
to try to delay action in Congress or another law-making group by making very long speeches:
Opponents of the bill tried to filibuster its final stages.
—filibuster noun [countable]