the extreme top or summit.

Informal . the highest point or degree

the very tiptop of physical condition.

Chiefly British Informal . the highest social class.

situated at the very top.

Informal . of the highest quality; excellent

a tiptop meal.

in a tiptop manner; very well

It's shaping up tiptop.

adjective

ace , banner , blue-ribbon , brag , capital , champion , fine , first-class , first-rate , prime , quality , splendid , superb , superior , terrific , top , best , elite , excellent , exceptional , extraordinary , supreme , uppermost