spiffy(s = adj.all) dapper, dashing, jaunty, natty, raffish, rakish, snappy, spruce - marked by up-to-dateness in dress and manners; "a dapper young man"; "a jaunty red hat"

spiffy, adj. (spiffier, spiffiest) esp. US sl. = SPIFFING.

Derivative:
spiffily adv.