adj. 25B6; adjective (informal)
he's too big to be nippy : AGILE, light-footed, nimble, light on one's feet, spry, supple, limber; informal twinkle-toed; poetic/literary lightsome.
a nippy hatchback : FAST, quick, lively; informal zippy.
it's a bit nippy in here : COLD, chilly, icy, bitter, raw.
lumbering, slow, warm.