In perfect form; doing extremely well. Used to describe very good condition or performance (e.g., in sports, sales, health).
今日の試合で彼は絶好調だった。
He was in top form in today's match.
新製品の売れ行きは絶好調だ。
Sales of the new product are going great.
朝からずっと絶好調で、仕事がはかどった。
I've been doing great all morning, so work went smoothly.