| Noun | 1. | boys-and-girls - Eurafrican annual naturalized in America as a weed; formerly dried for use as a purgative, diuretic or antisyphilitic herb, herbaceous plant - a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests genus Mercurialis, Mercurialis - a genus of slender herbs belonging to the family Euphorbiaceae |