snappish, snappy -- (apt to speak irritably; "a snappish tone of voice")
snappy, whipping -- (smart and fashionable; "snappy conversation"; "some sharp and whipping lines")
crisp, frosty, nipping, nippy, snappy -- (pleasantly cold and invigorating; "crisp clear nights and frosty mornings"; "a nipping wind"; "a nippy fall day"; "snappy weather")
alert, brisk, lively, merry, rattling, snappy, spanking, zippy -- (quick and energetic; "a brisk walk in the park"; "a lively gait"; "a merry chase"; "traveling at a rattling rate"; "a snappy pace"; "a spanking breeze")