definition  picayune
3. Something of very little value; a trifle: not worth a picayune. [Louisiana French picaillon, small coin, from French, from ProvenÃ§al picaioun, from picaio, money, perhaps from Old ProvenÃ§al piquar, to jingle, clink, from Vulgar Latin *piccÄre, to pierce; see pique.] picâ²aÂ·yunâ²ish adj.