A-one
     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}, {crack}, {first-rate},
            {super}, {tiptop}, {topnotch}, {tops(p)}]
Source: WordNet® 2.0