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