[syn: ace, A-one, crack, first-rate, super, tiptop, topnotch, top-notch, tops(p)]
The Collaborative International Dictionary of English v.0.48:
Tiptop \Tip"top`\, n. [Tip end + top.]
   The highest or utmost degree; the best of anything. [Colloq.]
   [1913 Webster]
The Collaborative International Dictionary of English v.0.48:
Tiptop \Tip"top`\, a.
   Very excellent; most excellent; perfect. [Colloq.] "Four
   tiptop voices." --Gray. "Sung in a tiptop manner."
   --Goldsmith.
   [1913 Webster]
WordNet (r) 3.0 (2006):
tiptop
    adj 1: 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" [syn: ace, A-one, crack,
           first-rate, super, tiptop, topnotch, top-notch,
           tops(p)]
    n 1: 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" [syn: acme, height, elevation, peak,
         pinnacle, summit, superlative, meridian, tiptop,
         top]
    2: the extreme top or summit