tiptop

nouns

the highest level or degree attainable; the highest stage of development
"his landscapes were deemed the acme of beauty"; "the artist's gifts are at their acme"; "at the height of her career"; "the peak of perfection"; "summer was at its peak"; "...catapulted Einstein to the pinnacle of fame"; "the summit of his ambition"; "so many highest superlatives achieved by man"; "at the top of his profession"
the extreme top or summit
is a type of (narrower)
the highest or uppermost side of anything
"put your books on top of the desk"; "only the top side of the box was painted"

adjectives

of the highest quality
"an ace reporter"; "a crack shot"; "a first-rate golfer"; "a super party"; "played top-notch tennis"; "an athlete in tiptop condition"; "she is absolutely tops"