noun. The zero points received by a team that fails to correctly answer any parts of a multi-part bonus question. By analogy to the shape of the number 0.
verb. The process of failing to answer any parts of a multi-part bonus question correctly, thereby receiving no points on the bonus. Synonymous with the verb "to zero" in this context (i.e. "We bageled that bonus on the Franco-Mongol alliance in the first finals match.").