sulkiness
     n 1: a mood or display of sullen aloofness or withdrawal; "stayed
          home in a sulk" [syn: {sulk}]
     2: a feeling of sulky resentment [syn: {huffishness}]
     3: a sullen moody resentful disposition [syn: {sullenness}, {moroseness},
         {sourness}]
Source: WordNet® 2.0