Source : Webster's Revised Unabridged Dictionary (1913)

Tiptop \Tip"top`\, n. [Tip end + top.]
   The highest or utmost degree; the best of anything. [Colloq.]

Tiptop \Tip"top`\, a.
   Very excellent; most excellent; perfect. [Colloq.] ``Four
   tiptop voices.'' --Gray. ``Sung in a tiptop manner.''
   --Goldsmith.

Source : WordNet®

tiptop
     adj : 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}, {topnotch}, {tops(p)}]