■ adjective ( sulkier , sulkiest ) morose, bad-tempered, and resentful.
■ noun ( plural sulkies ) a light two-wheeled horse-drawn vehicle for one person, used chiefly in trotting races.
Derivatives
sulkily adverb
sulkiness noun
Origin
C18: perh. from obs. sulke 'hard to dispose of', of unknown origin.