WordNet sense 1 (of no value):

valueless

WordNet sense 2 (cheap and inferior; of no value):

trashy

WordNet sense 3 (serving no useful purpose; having no excuse for being):

pointless

WordNet sense 4 (of no real value):

nugatory

WordNet sense 5 (not worth considering):

paltry, trifling

WordNet sense 6 (without merit):

meritless

WordNet sense 7 (value):

chaffy

WordNet sense 8 (morally reprehensible):

despicable, slimy, ugly, unworthy, vile, wretched

WordNet sense 9 (morally bad or wrong):

evil