noun (n)

• a mood or display of sullen aloofness or withdrawal(noun.feeling)

  Synonym:
  sulk
  

  source: wordnet30
• a feeling of sulky resentment(noun.feeling)

  Synonym:
  huffishness
  

  source: wordnet30
• a sullen moody resentful disposition(noun.attribute)

  Synonym:
  moroseness, sourness, sullenness
  

  source: wordnet30
• The quality or state of being sulky; sullenness; moroseness; as, sulkiness of disposition.(noun)

  source: webster1913