Petulant

Part of speech: adjective (a.)

1. Forward; pert; insolent; wanton. [Obs.] Burton.

2. Capriciously fretful; characterized by ill-natured freakishness; irritable. "Petulant moods." Macaulay.

Synonyms: Irritable; ill-humored; peevish; cross; fretful; querulous.