Do something dashingly, and you'll carry it off with style and confidence. If your date is dressed dashingly in a tuxedo, you may regret your decision to wear shorts and flip flops.
Some people just seem to do everything in an effortless, attractive way — in other words, dashingly. You might dream of moving dashingly across a dance floor or making dashingly romantic gestures that instantly charm others. This old-fashioned adverb stems from dashing, originally defined as "performed with dash," and by the early 19th century synonymous with the slang phrase "cutting a dash," or "acting brilliantly."