a man who is excessively concerned about his clothes and appearance; a fop.

Informal . something or someone of exceptional or first-rate quality

Your reply was a dandy.

characteristic of a dandy; foppish.

Informal . fine; excellent; first-rate

a dandy vacation spot.

adjective

bad , inferior , not good , second-rate , unacceptable

adjective

capital , cool * , exemplary , famous , first-class , first-rate , five-star , fly * , glorious , grand , great , groovy * , hunky-dory , keen , marvelous , model , neat , nifty , paragon , peachy * , prime , splendid , sup rior , swell , terrific , ace , banner , blue-ribbon , brag , champion , fine , quality , superb , superior , tiptop , top , divine , fabulous , fantastic , fantastical , sensational , wonderful , crackerjack , excellent , exquisite , humdinger , peachy