The story
Blend of Kirishima (切島) and Deku (でく, alternate kun'yomi reading of 出久 Izuku, homophonous with 木偶).
Etymology from Wiktionary, CC BY-SA 4.0.
KiriDeku
Today it means: The ship of characters Eijirou Kirishima and Izuku "Deku" Midoriya from the My Hero Academia series. Full definition →