From 飛(と)び降(お)り (tobiori, “jumping down”, 連(れん)用(よう)形(けい) (ren'yōkei, “stem or continuative form”) of the verb 飛(と)び降(お)りる (tobioriru, “to jump down; to jump”).) + 自殺(じさつ) (jisatsu, “suicide”).
とびおりじさつ • (tobiori jisatsu)