1) Bad-tempered 2) Cranky 3) Easily irritated or annoyed 4) Fractious 5) French word used in English 6) Ill-natured 7) Irritable 8) Nettlesome 9) Nut leapt about when sullen 10) Nut leapt about, sulking 11) Peckish 12) Peevish 13) Pettish 14) Pouting 15) Prone to pique 16) Prone to snits 17) Techy 18) Testy Found on https://www.crosswordclues.com/clue/petulant
Pet'u·lant adjective [ Latin petulans , -antis , prop., making slight attacks upon, from a lost dim. of petere to fall upon, to attack: confer French pétulant . See Petition .] 1. Forward; pert; insolent; wanton. [ Obsolete] Burton. 2. Cap... Found on http://www.encyclo.co.uk/webster/P/67