O'Brienism
/ə(ʊ)ˈbrʌɪənɪz(ə)m/noun
The anti-Union policy of William O'Brien, especially the extreme nationalism espoused by him in the British Parliament from the general election of 1892 to around 1901.
Origin
Late 19th century; earliest use found in Globe & Traveller. From the name of William O'Brien, Irish nationalist leader + -ism.