Sulkers are individuals who typically exhibit a disposition of being moody, sulky, or temperamental. These types of people often withdraw themselves from social interactions, and tend to remain aloof and unapproachable. Synonyms for sulkers include grumps, pouters, mopers, sourpusses, and malcontents. These words generally convey a sense of negativity and dissatisfaction with life. Pouters and mopers refer to individuals who are quick to sulk over trivial matters, while sourpusses and malcontents refer to those who exhibit a persistent gloominess and dissatisfaction with life. Overall, sulkers and their synonyms are best avoided, as their negative disposition can bring down the energy and mood of those around them.