n. trailing plant with edible leaves and bright orange, yellow, or red flowers. [Latin] nasty /’ na:sti/ adj. (-ier, -iest)1 highly unpleasant. 2 difficult to negotiate. 3 (of a person or animal) ill-natured. n. (pl. -les) colloq. horror film, esp. one on video and depicting cruelty or killing. nastily adv. nastiness n. [origin unknown]