From Wiktionary, the free dictionary
From underdog + -ism.
underdogism (uncountable)
- Tenacious support for the underdog, or disadvantaged party
1980, Lester O'Shea, Tampering with the Machinery[1], →ISBN, page 131:That creed, as it emerges from a study of the sacred oxen, is underdogism, which may be called egalitarianism or the yearning to level; […]
