にぎり寿司
にぎりずし nigirizushi; hand-pressed vinegared rice topped with seafood
Why it means this
にぎり (hand-pressed, from 握る) + 寿司 (sushi — ateji reading 寿, longevity + 司, manage — for すし, from 酸し, 'sour') — a hand-pressed finger of vinegared rice topped with fish.
Breakdown
Each character links to its full entry — origin story, stroke order, and readings.