Meaning
大とろ (おおとろ, ōtoro) is Otoro, a Japanese food (meats, sushi and sashimi).
What is Otoro?
Otoro is the most prized part of the tuna belly and is also the fattiest part of the tuna. This cut is located at lowest section of tuna belly and it is highest in fat content and light in color. Otoro is very rare, so you may not see it offered in most sushi restaurants, and the price is usually high because less than 1% of the tuna body can be categorized as otoro .