noun
Boston crab
A professional wrestling submission hold where the opponent is on their back and the wrestler applies pressure by pulling back on the legs.
彼は逆エビ固めで相手をタップさせた。
He made his opponent tap out with a Boston crab.
Compound of 逆 (reverse) + エビ (shrimp) + 固め (hold), referring to the bent-leg position resembling a shrimp.