Tiptop (noun)

The highest point or level of excellence.

Origin:

Derived from the phrase "tip top" which means the very top or highest point.

Examples:

1. The restaurant was at the tiptop of its popularity, always full and with a long waiting list.
2. The new car was at the tiptop of technology for its time.
3. The singer's performance was at the tiptop of her abilities.
4. The company was at the tiptop of its industry, with the highest profits and the most market share.
5. The athlete's training was at the tiptop level, with a strict regimen of diet and exercise.