nasty
Cross references: 1. dirty nas.ty \'nas-te-\ aj [ME] 1a: disgustingly filthy 1b: physically repugnant 2: INDECENT, OBSCENE 3: MEAN, TAWDRY 4a: extremely hazardous or harmful 4b: full of problems : KNOTTY 4c: sharply unpleasant {~ shock} 5: lacking in courtesy or sportsmanship : SPITEFUL