Entry 1 sense Webster, 1913 Rushbuckler · Rush·buc·kler · IPA 01 n. A bullying and violent person; a braggart; a swashbuckler. 1. A bullying and violent person; a braggart; a swashbuckler.[Obs.] “That flock of stout, bragging rushbucklers.” — Robynson (More's Utopia).